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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 ?

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 ? Correct Answer 7

18 pumps can rise 2170 tonnes in 7 hour in 10 days 18 pumps can rise 2170 tonnes in 1 hour in ( 10×7) days. 1 pumps can rise 1 tonnes in 1 hour in ( 10×7×18)/2170 days 16 pumps can rise 1736 tonnes b8n 9 hour in ( 10×7×18×1736)/ ( 2170×16×9) = 7 days

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