Question

It takes 484848 minutes for 777 people to paint 777 walls. How many minutes does it take 202020 people to paint 202020 walls?

Answer 1

Approximately 391 minutes taken by 20 people to paint 20 walls.

Explanation:

Given : It takes 48 minutes for 7 people to paint 7 walls.

To find : How many minutes does it take 20 people to paint 20 walls?

Solution :

7 people to paint 7 walls in 48 minutes.

So, 1 people to paint 7 walls in
`(48)/(7)` minutes.

and 1 people to paint 1 walls in
`(48)/(7* 7)` minutes.

Now, We have to find minutes does it take 20 people to paint 20 walls.

20 walls will be painted in
`(48* 20)/(7* 7)` minutes.

20 people to paint 20 walls in
`(48* 20* 20)/(7* 7)` minutes.

i.e.
`(48* 20* 20)/(7* 7)=(19200)/(49)=391.83`

Therefore, Approximately 391 minutes taken by 20 people to paint 20 walls.