Question

Three spraying machines working together can finish painting a house in 60 minutes. How long will it take for 5 machines of the same capacity to do the same job?

Answer 1

Let the time required to do the job be ‘x’ minutes

Time (min)	60	x
No. of spraying machines	3	5

We know k = xy

60 × 3 = x × 5

x = (60×3)/5

= 36

∴ 36 minutes is required to do the same job by 5 spraying machines of the same capacity.