49 pumps can empty a reservoir in `6 1/2 days` ' working 8 hours a day. If 196 pumps are used for 5 hours each day, then the same work will be completed in `2\ d a y s` b. `2 1/2d a y s` c. `2 3/5` d. `3\ d a y s`

Working 8 hours a day, 12 men can do a work in 30 days. Working 4 hours a day, 18 men can do the work in 30 d a y s b. 40 d a y s c. 45 d a y s d. 50 d a y s

Three pumps working 8 hours a day can empty a tank in 2 day. How many hours a day must 4 pumps work to empty the tank in 1 day.

A and B can complete a piece of work in 12 and 18 days respectively. A begins to do the work and they work alternatively one at a time for one day each. The whole work will be completed in 14 1/3d a y s b. 15 2/3d a y s c. 16 1/3d a y s d. 18 2/3d a y s

If M1 men can do W1 work in D1 days working H1 hours per day and M2 men can do W2 work in D2 days working H2 hours per day then

The work done by a woman in 8 hours is equal to the work done by a man in 6 hours and by a boy in 12 hours. If working 6 hours per day 9 men can complete a work in 6 days, then in how many days can 12 men, 12 women and 12 boys together finish the same work, working 8 hours per day? 1 1/2d a y s b. 3\ d a y s c. 3 2/3d a y s d. 4 1/2d a y s

12 pumps working 6 hours a day can empty a completely filled reservoir in 15 days. How many such pumps working 9 hours a day will empty the same reservoir in 12 days?

3 pumps, working 8 hours day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day? 9 b. 10 c. 11 d. 12

A and B together can complete a work in 12 days. A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work? 110 d a y s b. 11 d a y s c. 15 d a y s d. 20 d a y s

A can do a piece of work in 6 days working 8 hours a day while B can do the same work in 4 days working 10 hours a day. If the work has to be completed in 5 days, so how many hours do they need to work together in a day?