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<html><body><h2 id="content-id-4729135086-2"><b>Mensuration 3D Questions Overview</b></h2><p>Mensuration 3D Questions have a good weightage in the Ssc Chsl Exam and the type of question asked in Ssc Chsl exam is similar to the question mentioned below. It has been solved and explained by KD Live Experts under the guidance of Neetu Mam and they have tried to elaborate the concept used in Mensuration 3D Questions.</p><h2 id="content-id-8492753601-3"><b>Question On Mensuration 3D </b></h2>The ratio of the curved surface area of a cylinder to its total surface area is 7:10, respectively. If the volume of the cylinder is 12672 cm3, then find the curved surface area of the cylinder.
<div class="row show--dificulty--bar" style="margin-top:8px;"><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex !important;border-right:0.1px solid #eee;"><h3 style="font-size:12px !important;">Difficulty : Easy </h3></div><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex;"><h3 style="font-size:12px !important;"> Average Time : 36 Seconds </h3></div></div><h2 id="content-id-7612053948-4"><b> Mensuration 3D Questions Options</b></h2><ol><li><p>2080 cm<sup>2</sup></p>
</li><li><p>2348 cm<sup>2</sup></p>
</li><li><p>2112 cm<sup>2</sup></p>
</li><li><p>2648 cm<sup>2</sup></p>
</li></ol> <h2 id="content-id-2038549761-5"><b> Mensuration 3D Questions Solution</b></h2><p>The correct answer is<strong> option 3 </strong>i.e. <strong>2112 cm<sup>2</sup>.</strong></p>

<p>CSA : TSA = 7 : 10</p>

<p>2πrh : 2πr(h + r) = 7 : 10</p>

<p>⇒ h : (h + r) = 7 : 10</p>

<p>⇒ 10h = 7h + 7r</p>

<p>⇒ 3h = 7r</p>

<p>⇒ h = <span class="math-tex">\(7r\over3\)</span></p>

<p>Volume = πr<sup>2</sup>h = <span class="math-tex">\(22\over7\)</span> × r<sup>2</sup> × <span class="math-tex">\(7r\over3\)</span> = <span class="math-tex">\(22r^3\over3\)</span></p>

<p>⇒ 12672 = <span class="math-tex">\(22r^3\over3\)</span></p>

<p>⇒ r<sup>3</sup> = 1728</p>

<p>⇒ r = 12 cm</p>

<p>⇒ h = 28 cm</p>

<p>Curved surface area = 2 × <span class="math-tex">\(22\over7\)</span> × 12 × 28 = 2112 cm<sup>2</sup></p>
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The correct answer is option 3 i.e. 21 - Mensuration 3D Questions are asked in Ssc Chsl exams and your question has been explained by experts like Neetu Mam.

 Mensuration 3D Questions Tips and Tricks

The ratio of the curved s - Mensuration 3D Questions for Ssc Chsl

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