Question

It takes 48 minutes for 7 people to paint 7walls. How many minutes does it take 20 people to paint 20 walls?

Answer 1

it will take 48 minutes only.

Answer 2

48 minutes.

Explanation:

We have been given that it takes 48 minutes for 7 people to paint 7 walls. We are asked to find time taken by 20 people to paint 20 walls.

First of all, we will find time taken by one person to paint one wall as:

`\text{Time taken by one person to paint 7 walls}=48*7\text{min}`

`\text{Time taken by one person to paint 1 wall}=\frac{48*7\text{min}}{7}`

`\text{Time taken by one person to paint 1 wall}=48\text{min}`

`\text{Time taken by one person to paint 20 walls}=48*20\text{min}`

`\text{Time taken by 20 people to paint 20 walls}=\frac{48*20\text{min}}{20}`

`\text{Time taken by 20 people to paint 20 walls}=48\text{min}`

Since one person can paint one wall in 48 minutes, so 20 people will paint 20 walls in 48 minutes as well.