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Q.
A Tank is normally filled in 9 hours but takes four hours longer to fill because of a leak in its bottom. If the tank is full, the leak will empty it in ?
A.
32.5 hrs
B.
29.25 hrs
C.
30.30 hrs
D.
31 hrs
View Answer
Correct choice: B
Explanation:
Let the leak will empty the tank in x hrs Then, 1/9 - 1/x = 1/13 x = 29.25 hrs
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