Iift 2020 Question 23
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IIFT
Let the tank capacity be 64 liters.
Hence, capacity of pipes A and B resp are 4 lit/min and 2 lit/min
Also, the capacity of the draining pipe = -1 lit/min
Now, when all pipes are open for 09 mins, tank filled = (4+2)*9 - (9*1) = 45 liters
Now, the tank travels for (6/36)*60 min = 10 minutes
During this time, liquid lost = 10*1 lit/min = 10 liters
Liquid left = 35 liters
hence, percentage filled = 35/64 = 55% approx