Question

It takes 52 minutes for 5 people to paint 5 walls. How many minutes does it take 20 people to paint 20 walls?

Answer 1

5 people..............5 walls............52 min
1 people...............5 walls...........52*5=260 min
1 people................20 walls.........260*4 =1040 min
20 people................20 walls........1040:20=52 min

Answer 2

Answer:52 min

Explanation:

Given

5 people paint 5 walls in 52 minutes

Now if 1 person paints the 5 walls then time required will be 5 times more

1 Person paint 5 walls in
`52* 5`

For 20 walls person has to do 4 times the previous walls

1 person paints 20 walls in
`52* 5* 4`

For 20 People time required will be 20 times less

i.e.

`(52* 5* 4)/(20)=52 mins`