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If 6 men can do a piece of work in 30 days of 9 hours each,

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If 6 men can do a piece of work in 30 days of 9 hours each, how many men will it take to do 10 times the amount of work if they work for 25 days of 8 hours?

A. 61
B. 64
C. 84
D. 81
E. 94


Please help explains using rates formulae as I could not get the answer. Thanks

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