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<html><body><h2 id="content-id-8493271650-2"><b>Pipes And Cistern Questions Overview</b></h2><p>Pipes And Cistern Questions have a good weightage in the Sbi Clerk Exam and the type of question asked in Sbi Clerk 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 Pipes And Cistern Questions.</p><h2 id="content-id-9605382147-3"><b>Question On Pipes And Cistern </b></h2>Two pipes A and B can fill a cistern in 15 hours and 12 hours respectively. Both pipes when opened simultaneously, due to a leakage in the cistern take 20 min extra to fill it. Find the time taken by the leakage to empty the full cistern alone.
<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 : 40 Seconds </h3></div></div><h2 id="content-id-6273180549-4"><b> Pipes And Cistern Questions Options</b></h2><ol><li><p>80 hours</p>
</li><li><p>120 hours</p>
</li><li><p>180 hours</p>
</li><li><p>150 hours</p>
</li><li><p>140 hours</p>
</li></ol> <h2 id="content-id-6124509873-5"><b> Pipes And Cistern Questions Solution</b></h2><p>The correct answer is <strong>Option 5</strong> i.e. <strong>140 hours.</strong></p>

<table border="1" cellpadding="1" cellspacing="1" style="width:300px">
	<tbody>
		<tr>
			<td>
			<p>Understanding</p>
			</td>
			<td>
			<p>Application</p>
			</td>
		</tr>
		<tr>
			<td>
			<p>Given:</p>

			<p>Pipe A and B can fill the cistern in 15 hours and 12 hours respectively</p>
			</td>
			<td>
			<p>Suppose the total capacity of the cistern</p>

			<p>= 60 units (LCM of 15 and 12)</p>
			</td>
		</tr>
		<tr>
			<td>
			<p>Since,</p>

			<p>Efficiency = Work/Time</p>
			</td>
			<td>
			<p>So,</p>

			<p>Efficiency of pipe A = 60/15 = 4</p>

			<p>Efficiency of pipe B = 60/12 = 5</p>
			</td>
		</tr>
		<tr>
			<td>
			
			</td>
			<td>
			<p>Time in which A and B together can fill the cistern = 60/(4 + 5)</p>

			<p>= 60/9 = 20/3 hours</p>
			</td>
		</tr>
		<tr>
			<td>
			<p>Both pipes opened simultaneously, due to a leakage in cistern it takes 20 min extra to fill it up.</p>

			<p>Suppose the efficiency of leakage is ‘x’</p>
			</td>
			<td>
			<p>So,</p>

			<p>(4 + 5 – x) × (20/3 + 20/60) = 60</p>

			<p>(9 – x) × 7 = 60</p>

			<p>x = 9 – 60/7</p>

			<p>x = 3/7</p>
			</td>
		</tr>
		<tr>
			<td>
			
			</td>
			<td>
			<p>Hence,</p>

			<p>Time taken by the leakage to empty the full cistern alone = 60/(3/7) = 140 hours</p>
			</td>
		</tr>
	</tbody>
</table>
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The correct answer is Option 5 i.e. 140  - Pipes And Cistern Questions are asked in Sbi Clerk exams and your question has been explained by experts like Neetu Mam.

 Pipes And Cistern Questions Tips and Tricks

Two pipes A and B can fil - Pipes And Cistern Questions for Sbi Clerk

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