40 mechanics can repair a bike in 56 days. In how many days 32 mechanics will do the same work?
A60 days
B56 days
C80 days
D70 days
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There are 3 taps, A, B and C, in a tank. These can fill the tank in 10 h, 20 h and 25 h, respectively. At first, all three taps are opened simultaneously. After 2 h, tap C is closed and tap A and B keep running. After 4 h, tap B is also closed. The remaining tank is filled by tap A alone. Find the percentage of work done by tap A itself.
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