Question

It takes 36 minutes for 7 people to paint 4 walls. How many minutes does it take 9 people to paint 7 walls?

Answer 1

people.......... time........walls

7.....................36...........4

9......................x.............7

4x=36×7

4x=252

x=63

hence it'll take 63 minutes

hope this works

Answer 2

It takes 45 minutes for 9 people to paint 7 walls

Step-by-step explanation:

Time taken by 7 people to paint 4 walls = 36 minutes

Time taken by 1 people to paint 4 walls =$36 \times 7$

Time taken by 1 people to paint 1 walls =$\frac{36 \times 7}{4}$

Time taken by 9 people to paint 1 walls = $\frac{36 \times 7}{4 \times 9}$

Time taken by 9 people to paint 7 walls =$\frac{36 \times 7}{4 \times 9} \times 7$

Time taken by 9 people to paint 7 walls = 49 minutes

Hence It takes 45 minutes for 9 people to paint 7 walls

#Learn more:

If 6 painters can paint a wall 9m long in 3days, then the number of painters required to paints 10m long wall in 5 days

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