Question

10 boys clear a piece of land in 21 days. How many days will it take 7 boys to clear the same land at the same rate

Pls i need answer fast​

Answer 1

Given:

10 boys clear a piece of land in 21 days.

To find:

The number of days it will take 7 boys to clear the same land at the same rate.

Solution:

We have,

10 boys clear a piece of land in 21 days.

Total work =
`10* 21`

=
`210`

Let 7 boys clear the same piece of land in x days.

Total work =
`7* x`

=
`7x`

Now, the total work is same.

`7x=210`

Divide both sides by 7.

`x=(210)/(7)`

`x=30`

Therefore, 7 boys clear the same piece of land in 30 days.