Rumus Mengkalkulasikan Luas Permukaan Tabung

Seperti yang kita pahami bahwa tabung terdiri dari tiga sisi : ganjal, epilog dan selimut (sisi melengkung) seperti yang ditunjukkan oleh gambar di bawah ini :

Maka dari itu untuk menjumlah luas permukaan maka kita harus mengkalkulasikan terlebih dahulu luas dari ketiga segi yang terdapat pada sebuah tabung. Mencari Luas Sisi/Bidang Bangun Ruang Tabung Karena bangun ruang Tabung terdiri dari tiga sisi :
1. Alas
2. Penututp
3. Selimut 1. Luas Alas Tabung Alas Tabung berupa lingkaran, maka :

Luas Alas Tabung = π x r²

2. Luas Penutup Tabung Tutup (cover) Tabung juga berbentuk bulat, maka :

Luas Tutup Tabung = π x r²

3. Luas Selimut Tabung Rumus untuk mencari luas selimut tabung yaitu selaku berikut :

Luas Tutup Tabung = 2 x π x r x t

Rumus Luas Permukaan Tabung Karena permukaan tabung berisikan : bantalan + tutup + selimut, maka rumus mencari luas permukaan tabung yaitu sebagai berikut : Luas Permukaan Tabung = Luas Alas + Luas Tutup + Luas Selimut
Luas Permukaan Tabung = π x r² + π x r² + 2 x π x r x t
Luas Permukaan Tabung = 2πr² + 2πrt
Luas Permukaan Tabung = 2πr(r + t)

Dengan demikian, luas permukaan tabung yaitu :

Luas Permukaan Tabung = 2πr(r + t)

Contoh Soal Luas Permukaan Tabung Soal No.1 Jika anda hendak menciptakan suatu kaleng yang memiliki jari-jari 7 cm dan tinggi 18 cm. Berapakah luas materi yang diperlukan untuk membuat kaleng tersebut ? Pembahasan Kaleng yakni salah satu benda yang berbentuk tabung.
r = 7 cm
t = 18 cm

Luas Permukaan Kaleng = 2πr(r + t)
Luas Permukaan Kaleng = 2

22 / 7

x 7(7 + 18)
Luas Permukaan Kaleng = 44(25)
Luas Permukaan Kaleng = 1100 cm³

Dengan demikian luas bahan yang diperlukan ialah 1100 cm³

Soal No.2 Diketahui jari-jari sebuah bangkit ruang tabung yakni 7 cm. Jika tinggi tabung tersebut adalah 28 cm. Tentukanlah luas permukaan tabung tersebut ? Pembahasan Kaleng yakni salah satu benda yang berbentuk tabung.
r = 7 cm
t = 28 cm

Luas Permukaan Kaleng = 2πr(r + t)
Luas Permukaan Kaleng = 2

22 / 7

x 7(7 + 28)
Luas Permukaan Kaleng = 44(35)
Luas Permukaan Kaleng = 1540 cm³

Kaprikornus luas permukaan tabung adalah 1540 cm³

(adsbygoogle = window.adsbygoogle || []).push({}); !function(){"use strict";if("querySelector"in document&&"addEventListener"in window){var e=document.body;e.addEventListener("mousedown",function(){e.classList.add("using-mouse")}),e.addEventListener("keydown",function(){e.classList.remove("using-mouse")})}}(); var wpcf7 = {"api":{"root":"https:\/\/tunascakrawala.sch.id\/wp-json\/","namespace":"contact-form-7\/v1"},"cached":"1"}; "use strict";var _createClass=function(){function defineProperties(target,props){for(var i=0;i<props.length;i++){var descriptor=props[i];descriptor.enumerable=descriptor.enumerable||!1,descriptor.configurable=!0,"value"in descriptor&&(descriptor.writable=!0),Object.defineProperty(target,descriptor.key,descriptor)}}return function(Constructor,protoProps,staticProps){return protoProps&&defineProperties(Constructor.prototype,protoProps),staticProps&&defineProperties(Constructor,staticProps),Constructor}}();function _classCallCheck(instance,Constructor){if(!(instance instanceof Constructor))throw new TypeError("Cannot call a class as a function")}var RocketBrowserCompatibilityChecker=function(){function RocketBrowserCompatibilityChecker(options){_classCallCheck(this,RocketBrowserCompatibilityChecker),this.passiveSupported=!1,this._checkPassiveOption(this),this.options=!!this.passiveSupported&&options}return _createClass(RocketBrowserCompatibilityChecker,[{key:"_checkPassiveOption",value:function(self){try{var options={get passive(){return!(self.passiveSupported=!0)}};window.addEventListener("test",null,options),window.removeEventListener("test",null,options)}catch(err){self.passiveSupported=!1}}},{key:"initRequestIdleCallback",value:function(){!1 in window&&(window.requestIdleCallback=function(cb){var start=Date.now();return setTimeout(function(){cb({didTimeout:!1,timeRemaining:function(){return Math.max(0,50-(Date.now()-start))}})},1)}),!1 in window&&(window.cancelIdleCallback=function(id){return clearTimeout(id)})}},{key:"isDataSaverModeOn",value:function(){return"connection"in navigator&&!0===navigator.connection.saveData}},{key:"supportsLinkPrefetch",value:function(){var elem=document.createElement("link");return elem.relList&&elem.relList.supports&&elem.relList.supports("prefetch")&&window.IntersectionObserver&&"isIntersecting"in IntersectionObserverEntry.prototype}},{key:"isSlowConnection",value:function(){return"connection"in navigator&&"effectiveType"in navigator.connection&&("2g"===navigator.connection.effectiveType||"slow-2g"===navigator.connection.effectiveType)}}]),RocketBrowserCompatibilityChecker}(); var RocketPreloadLinksConfig = {"excludeUris":"\/(?:.+\/)?feed(?:\/(?:.+\/?)?)?$|\/(?:.+\/)?embed\/|\/(index\\.php\/)?wp\\-json(\/.*|$)|\/wp-admin\/|\/logout\/|\/wp-login.php|\/refer\/|\/go\/|\/recommend\/|\/recommends\/","usesTrailingSlash":"1","imageExt":"jpg|jpeg|gif|png|tiff|bmp|webp|avif","fileExt":"jpg|jpeg|gif|png|tiff|bmp|webp|avif|php|pdf|html|htm","siteUrl":"https:\/\/tunascakrawala.sch.id","onHoverDelay":"100","rateThrottle":"3"}; (function() { "use strict";var r="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(e){return typeof e}:function(e){return e&&"function"==typeof Symbol&&e.constructor===Symbol&&e!==Symbol.prototype?"symbol":typeof e},e=function(){function i(e,t){for(var n=0;n<t.length;n++){var i=t[n];i.enumerable=i.enumerable||!1,i.configurable=!0,"value"in i&&(i.writable=!0),Object.defineProperty(e,i.key,i)}}return function(e,t,n){return t&&i(e.prototype,t),n&&i(e,n),e}}();function i(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}var t=function(){function n(e,t){i(this,n),this.browser=e,this.config=t,this.options=this.browser.options,this.prefetched=new Set,this.eventTime=null,this.threshold=1111,this.numOnHover=0}return e(n,[{key:"init",value:function(){!this.browser.supportsLinkPrefetch()||this.browser.isDataSaverModeOn()||this.browser.isSlowConnection()||(this.regex={excludeUris:RegExp(this.config.excludeUris,"i"),images:RegExp(".("+this.config.imageExt+")$","i"),fileExt:RegExp(".("+this.config.fileExt+")$","i")},this._initListeners(this))}},{key:"_initListeners",value:function(e){-1<this.config.onHoverDelay&&document.addEventListener("mouseover",e.listener.bind(e),e.listenerOptions),document.addEventListener("mousedown",e.listener.bind(e),e.listenerOptions),document.addEventListener("touchstart",e.listener.bind(e),e.listenerOptions)}},{key:"listener",value:function(e){var t=e.target.closest("a"),n=this._prepareUrl(t);if(null!==n)switch(e.type){case"mousedown":case"touchstart":this._addPrefetchLink(n);break;case"mouseover":this._earlyPrefetch(t,n,"mouseout")}}},{key:"_earlyPrefetch",value:function(t,e,n){var i=this,r=setTimeout(function(){if(r=null,0===i.numOnHover)setTimeout(function(){return i.numOnHover=0},1e3);else if(i.numOnHover>i.config.rateThrottle)return;i.numOnHover++,i._addPrefetchLink(e)},this.config.onHoverDelay);t.addEventListener(n,function e(){t.removeEventListener(n,e,{passive:!0}),null!==r&&(clearTimeout(r),r=null)},{passive:!0})}},{key:"_addPrefetchLink",value:function(i){return this.prefetched.add(i.href),new Promise(function(e,t){var n=document.createElement("link");n.rel="prefetch",n.href=i.href,n.onload=e,n.onerror=t,document.head.appendChild(n)}).catch(function(){})}},{key:"_prepareUrl",value:function(e){if(null===e||"object"!==(void 0===e?"undefined":r(e))||!1 in e||-1===["http:","https:"].indexOf(e.protocol))return null;var t=e.href.substring(0,this.config.siteUrl.length),n=this._getPathname(e.href,t),i={original:e.href,protocol:e.protocol,origin:t,pathname:n,href:t+n};return this._isLinkOk(i)?i:null}},{key:"_getPathname",value:function(e,t){var n=t?e.substring(this.config.siteUrl.length):e;return n.startsWith("/")||(n="/"+n),this._shouldAddTrailingSlash(n)?n+"/":n}},{key:"_shouldAddTrailingSlash",value:function(e){return this.config.usesTrailingSlash&&!e.endsWith("/")&&!this.regex.fileExt.test(e)}},{key:"_isLinkOk",value:function(e){return null!==e&&"object"===(void 0===e?"undefined":r(e))&&(!this.prefetched.has(e.href)&&e.origin===this.config.siteUrl&&-1===e.href.indexOf("?")&&-1===e.href.indexOf("#")&&!this.regex.excludeUris.test(e.href)&&!this.regex.images.test(e.href))}}],[{key:"run",value:function(){"undefined"!=typeof RocketPreloadLinksConfig&&new n(new RocketBrowserCompatibilityChecker({capture:!0,passive:!0}),RocketPreloadLinksConfig).init()}}]),n}();t.run(); }()); var generatepressMenu = {"toggleOpenedSubMenus":"1","openSubMenuLabel":"Open Sub-Menu","closeSubMenuLabel":"Close Sub-Menu"}; var generatepressNavSearch = {"open":"Open Search Bar","close":"Close Search Bar"}; var generatepressBackToTop = {"smooth":"1"}; window.lazyLoadOptions={elements_selector:"img[data-lazy-src],.rocket-lazyload,iframe[data-lazy-src]",data_src:"lazy-src",data_srcset:"lazy-srcset",data_sizes:"lazy-sizes",class_loading:"lazyloading",class_loaded:"lazyloaded",threshold:300,callback_loaded:function(element){if(element.tagName==="IFRAME"&&element.dataset.rocketLazyload=="fitvidscompatible"){if(element.classList.contains("lazyloaded")){if(typeof window.jQuery!="undefined"){if(jQuery.fn.fitVids){jQuery(element).parent().fitVids()}}}}}};window.addEventListener('LazyLoad::Initialized',function(e){var lazyLoadInstance=e.detail.instance;if(window.MutationObserver){var observer=new MutationObserver(function(mutations){var image_count=0;var iframe_count=0;var rocketlazy_count=0;mutations.forEach(function(mutation){for(var i=0;i<mutation.addedNodes.length;i++){if(typeof mutation.addedNodes[i].getElementsByTagName!=='function'){continue} if(typeof mutation.addedNodes[i].getElementsByClassName!=='function'){continue} images=mutation.addedNodes[i].getElementsByTagName('img');is_image=mutation.addedNodes[i].tagName=="IMG";iframes=mutation.addedNodes[i].getElementsByTagName('iframe');is_iframe=mutation.addedNodes[i].tagName=="IFRAME";rocket_lazy=mutation.addedNodes[i].getElementsByClassName('rocket-lazyload');image_count+=images.length;iframe_count+=iframes.length;rocketlazy_count+=rocket_lazy.length;if(is_image){image_count+=1} if(is_iframe){iframe_count+=1}}});if(image_count>0||iframe_count>0||rocketlazy_count>0){lazyLoadInstance.update()}});var b=document.getElementsByTagName("body")[0];var config={childList:!0,subtree:!0};observer.observe(b,config)}},!1)function lazyLoadThumb(e){var t='<img data-lazy-src="https://i.ytimg.com/vi/ID/hqdefault.jpg" alt="" width="480" height="360"><noscript><img src="https://i.ytimg.com/vi/ID/hqdefault.jpg" alt="" width="480" height="360">

',a='';return t.replace("ID",e)+a}function lazyLoadYoutubeIframe(){var e=document.createElement("iframe"),t="ID?autoplay=1";t+=0===this.parentNode.dataset.query.length?'':'&'+this.parentNode.dataset.query;e.setAttribute("src",t.replace("ID",this.parentNode.dataset.src)),e.setAttribute("frameborder","0"),e.setAttribute("allowfullscreen","1"),e.setAttribute("allow", "accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture"),this.parentNode.parentNode.replaceChild(e,this.parentNode)}document.addEventListener("DOMContentLoaded",function(){var e,t,p,a=document.getElementsByClassName("rll-youtube-player");for(t=0;t