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Q.
A water tank in a village is normally filled in 8 hours but takes 2 hours longer to fill because of a leak in its bottom. If the tank is full, in how many hrs will the leak empty it ?
A.
34 hrs
B.
36 hrs
C.
38 hrs
D.
40 hrs
View Answer
Correct choice: D
Explanation:
The time taken by the leak to empty the tank = 1 8 − 1 10 = 5 − 4 40 = 1 40 18 - 110 = 5 - 440 = 140 Therefore, the leak empties the tank in 40 hours.
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