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Question
A pump can fill with water in 2 hours. Because of a leak, it took
2
1
3
hours to fill the bank . The leak can drain all water of the tank in:
4
1
3
h
r
s
.
7 hrs.
8 hrs
14 hrs.
ANSWER : 4
Descrption
<p>Because of leak fill the tank in 7/3 h</p> <p>In 1 hour fill the tank 3/7 part</p> <p>Fill the tank in 2 hour</p> <p>So in 1 hour fill the tank 1/2 part</p> <p>ATQ,</p> <p>1/2 - 3/7 = 1/14 part in 1 hour</p> <p>So, 1 part fill the tank 14 hour</p> <p>ans: 14 hrs</p>
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