Question

If 2 robots can paint 2 cars in 2 hours then how many robots are needed to paint 24 cars in 8 hours?

Answer 1

as we can see that

number of robots=2

number of cars=2

number of hours=2

ratio of cars and hours for number robots=2:2=2/2=1

it shows that one robot polishes one car in one hour

now we have given ratio

24:8

we have to find number of robots to complete the task

hence we  can find

number of robots=(24:8)

number of robots=24/8

number of robots=3

Answer 2

2 robots can paint 2 cars in 2 hours (Given)

Find the number of robots needed to paint 8 cars

(2 x 12) robots paint (2 x 12) cars in 2 hours

24 robots can paint 24 cars in 2 hours

Find the number of robots needed to paint the 24 cars in 8 hours:

(24 ÷ 4) robots can paint 24 cars in (2 x 4) hours

6 robots can paint 24 cars in 8 hours

Answer: 6 robots can paint 24 cars in 8 hours