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<html><body><h2 id="content-id-8612470593-2"><b>Coordinate Geometry Questions Overview</b></h2><p>Coordinate Geometry Questions have a good weightage in the Ssc Cgl Exam and the type of question asked in Ssc Cgl 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 Coordinate Geometry Questions.</p><h2 id="content-id-7865310924-3"><b>Question On Coordinate Geometry </b></h2>The internal diameter of a hollow hemispherical vessel is 2.4 cm. It is made of a steel sheet which is 0.5 cm thick. What is the total surface area (in cm2) of the vessel?
<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 : Moderate </h3></div><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex;"><h3 style="font-size:12px !important;"> Average Time : 35 Seconds </h3></div></div><h2 id="content-id-8401573926-4"><b> Coordinate Geometry Questions Options</b></h2><ol><li><p><span style="font-size:14px">600.5 π </span></p>
</li><li><p><span style="font-size:14px">600.2 π </span></p>
</li><li><p><span style="font-size:14px">468.75 π </span></p>
</li><li><p><span style="font-size:14px">612.75 π </span></p>
</li></ol> <h2 id="content-id-8743925016-5"><b> Coordinate Geometry Questions Solution</b></h2><p><span style="font-size:14px">The correct answer is <strong>4</strong> i.e. <strong>612.75π</strong></span></p>

<p><span style="font-size:14px">Explanation :</span></p>

<p><span style="font-size:14px">Internal diameter of hollow hemispherical vessel = 24 cm </span></p>

<p><span style="font-size:14px">Internal radius (r)=24/2=12 cm</span></p>

<p><span style="font-size:14px">External Radius (R)= r + thickness of sheet </span></p>

<p><span style="font-size:14px">                               = 12 + 0.5 = 12.5 cm</span></p>

<p><span style="font-size:14px">Surface area of internal vessel = 2π × r²=2π × 12² = 288π  </span></p>

<p><span style="font-size:14px">Surface area of external vessel = 2π R² = 2π(12.5)² = 312.5</span></p>

<p><span style="font-size:14px">Surface area of ring = π  (R² - r²) </span></p>

<p><span style="font-size:14px">                                 = π (12.5² - 12²)</span></p>

<p><span style="font-size:14px">                                 =π (156.25 - 144)</span></p>

<p><span style="font-size:14px">                                 = 12.25π  </span></p>

<p><span style="font-size:14px">T.S.A = 288π + 312.5 π + 12.25π </span></p>

<p><span style="font-size:14px">         = 612.75π  </span></p>
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The correct answer is 4 i.e. 612.75?  - Coordinate Geometry Questions are asked in Ssc Cgl exams and your question has been explained by experts like Neetu Mam.

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