Question

15 labourers were employed to build a wall in 28 days.how many more labourers should be employed to finish the construction in 21 days?​

Answer 1

To find the number of additional labourers needed to finish the construction in 21 days, we need to first find the rate at which the 15 labourers were able to build the wall. We can do this by dividing the number of days it took to build the wall by the number of labourers: 28 days / 15 labourers = 1.87 days/labourer.

Next, we need to find the rate at which the labourers would need to work to finish the wall in 21 days. We can do this by dividing the number of days by the number of labourers: 21 days / X labourers = 1.87 days/labourer, where X is the number of labourers we need to find.

Solving this equation for X, we find that we would need 21 labourers to finish the construction in 21 days. Therefore, we would need 21 - 15 = <<21-15=6>>6 additional labourers.