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A certain number of persons can complete a work in 34 days working 9 h

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| A certain number of persons can complete a work in 34 days working 9 hours in a day. If the number of persons is decreased by 40%, then how many hours a day should the remaining persons work to complete the work in 51 days?

A. 8

B. 9

C. 12

D. 10

Right Answer is: D

SOLUTION

Let the certain no. of person be

By M. D. H. formula,

No. of hours = 10

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    1. A certain number of persons can complete a work in 34 days working 9 h

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