maths
posted by tuhituhi on .
if 8 labourers can earn rs.9000 in 15 days.how many laboures can earn rs. 6300 in 7 days?

1 labourday = 9000/(8*15) = 75
So to earn 6300 would take 6300/75 = 84 labour days
so the number of labourers to work 7 days = 84/7 = 12