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Question
A tap can fill a tank in 6hours.After half hour the tank filled ,three more similar taps are opened.What is the total time taken to fill the tank completely?
3hrs 15min
3hrs 45 min
4hrs
4hrs 15min
ANSWER : 3
Descrption
<p>A tap in 6 hours can fill 1 portion</p> <p>A tap in 1 hours can fill 1/6 portion</p> <p>By 1st 1/2 portion is filled by 3 hours</p> <p>The left 1/2 portion is filled by 3 same tap</p> <p>Now, By 1 tap 1/6 portion is filled in 1 hours</p> <p> By. 3 tap 3/6 portion is filled in 1 hours</p> <p>or 1/2 portion is filled in 1 hours</p> <p>So, total required time is = (3 + 1) hours = 4 hours </p> <p> </p>
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