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Question 1:
A tank has two leakages. The first leakage alone can empty the tank in 9 minutes and the second alone would have done it in 6 minutes. If water leaks out at a constant rate,
how long does it take both the leakage together to empty the tank?
A. 3.1 min
B. 3.6 min
Feedback 1 minute's work of both the leakage = 1/9+1/6 = 5/18 So, both the leakage will empty the tank in 18/5 min
C. 3.5 min
D. 4 min

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