Question

three spraying machines working together can finish painting a house in 60minutes.how long it will take for 5machines of the same capacity of the same job.​

Answer 1

Step-by-step explanation:

Let the time taken by 5 spraying machines to finish a painting job be x minutes.

Number of machines 3 5

Time ( in minutes ) 60 x

Since, the number of spraying machines and the time taken by them to finish a painting job are in inverse variation, we have:

⇒ 3×60=5×x

⇒ 180=5x

⇒ x= 180/5

x = 36

∴ The required time will be 36