If 18 pumps can raise 2170 tonnes of water in 10 days, working 7 hours a day ; in how many days will 16 pumps raise 1736 tonn...
Answer:
7
If 18 pumps can raise 2170 tonnes of water in 10 days, working 7 hours a day ; in how many days will 16 pumps raise 1736 tonnes of water, working 9 hours a day ?