Thirty men take 20 days to complete a job working 9 hours a day. how many hour a day should 40 men work to complete the job?
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If the question is to find the number of hours 40 men need to work in a day to complete the job in 20 days, the answer is as follows :-
Let the men be M
Hours be H
Days be D
M1D1H1 = M2D2H2
M1 = 30,D1 = 20,H1 = 9
M2 = 40,D2 = 20,H2 = ?
30×20×9 = 40×20×H2
H2 = 30×20×9/40×20
H2 = 270/40
H2 = 6.75 hours
number of hours 40 men need to work in a day to complete the job in 20 days is 6.75 hours
Hope it helps....
Let the men be M
Hours be H
Days be D
M1D1H1 = M2D2H2
M1 = 30,D1 = 20,H1 = 9
M2 = 40,D2 = 20,H2 = ?
30×20×9 = 40×20×H2
H2 = 30×20×9/40×20
H2 = 270/40
H2 = 6.75 hours
number of hours 40 men need to work in a day to complete the job in 20 days is 6.75 hours
Hope it helps....
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