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A train travels at an average speed of 50 miles per hour. It travels for 2 1/2 hours.

A tap can fill a tank in 50 minutes. If the tank has a leakage which alone is capable of emptying the tank in 2^(1//2) hours, the tank will now be filled in __________ A. 1 hour B. 1 hour 15 mins C. 1 hour 25 mins D. 1 hour 30 mins

Anuradha can do a piece of work in 6 hours. What part of the work can she do in 1 hour, in 5 hours, in 6 hours?