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?

Explanation

Let the time taken by `5` spraying machines to finish a painting job be `x` minutes.
Since, the number of spraying machines and the time taken by them to finish a painting job are in inverse variation, we have:
`=> 3xx60=5xxx`
`=> 180=5x`
`=> x= 180/5`
​`therefore` `x=36`
`therefore` The required time will be `36` minutes.