25 men with10 boys can do in 6 daysas much work as 21 men with 30 boys can do in 5 days. how many boys must help 40 men to do the same work in 4 days?
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The amount of work performed by a man and boy for one day is taken as m and b respectively.
According to the euation: 6(25m + 10 b)= 5 (21m + 30b)= 150m + 60b = 105m + 150 b. thus m= 2
b. The total amount of work = 150 m + 60b = 360b. Thus, 4 (40m+xb) = 360b thus x= 10. The no of boys needed for the work = 10.
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