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The curved surface area of a cone is 1980 cm2 and its radius is 21cm, what is the slanted height of a cone? (Take π = 227\frac{22}{7})

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MCQs on surface areas and volumes, surface areas of cube, cuboid and sphere, surface areas of right circular cylinder and cone, cuboid and cylinder volumes, volumes of right circular cone and sphere.


The curved surface area of a cone is 1980 cm<sup>2</sup> and its radius is 21cm, what is the slanted height of a cone? (Take π = <span class='MathJax_Preview' style=''></span><span class='MathJax' id='MathJax-Element-3-Frame' tabindex='0' style=''><nobr><span class='math' id='MathJax-Span-11' style='width: 1.293em; display: inline-block;'><span style='display: inline-block; position: relative; width: 1.024em; height: 0px; font-size: 124%;'><span style='position: absolute; clip: rect(1.347em, 1001.02em, 2.96em, -999.997em); top: -2.363em; left: 0em;'><span class='mrow' id='MathJax-Span-12'><span class='mfrac' id='MathJax-Span-13'><span style='display: inline-block; position: relative; width: 0.809em; height: 0px; margin-right: 0.11em; margin-left: 0.11em;'><span style='position: absolute; clip: rect(3.336em, 1000.65em, 4.142em, -999.997em); top: -4.406em; left: 50%; margin-left: -0.374em;'><span class='mn' id='MathJax-Span-14' style='font-size: 70.7%; font-family: MathJax_Main;'>22</span><span style='display: inline-block; width: 0px; height: 3.981em;'></span></span><span style='position: absolute; clip: rect(3.336em, 1000.33em, 4.142em, -999.997em); top: -3.599em; left: 50%; margin-left: -0.159em;'><span class='mn' id='MathJax-Span-15' style='font-size: 70.7%; font-family: MathJax_Main;'>7</span><span style='display: inline-block; width: 0px; height: 3.981em;'></span></span><span style='position: absolute; clip: rect(0.863em, 1000.81em, 1.239em, -999.997em); top: -1.288em; left: 0em;'><span style='display: inline-block; overflow: hidden; vertical-align: 0em; border-top: 1.3px solid; width: 0.809em; height: 0px;'></span><span style='display: inline-block; width: 0px; height: 1.078em;'></span></span></span></span></span><span style='display: inline-block; width: 0px; height: 2.368em;'></span></span></span><span style='display: inline-block; overflow: hidden; vertical-align: -0.597em; border-left: 0px solid; width: 0px; height: 1.737em;'></span></span></nobr></span><script type='math/tex' id='MathJax-Element-3'>\frac{22}{7}</script>)






 
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