Question

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

Please solve step by step​

Answer 1

Answer:

Correct option is

A

36

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=

5

180

∴ x=36

∴ The required time will be 36 minutes.

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Answer 2

Answer:

36 mins

Step-by-step explanation:

3 Machines finish painting in 60 mins

1 Machine will finish painting in (60 × 3) = 180 mins (less machines, more time)

5 machines will finish painting in (180/5) = 36 mins (more machines, less time)

Ans - 5 machines will finish painting the house in 36 mins.

hope this helps...