Question

it takes a particular machine 6 minutes to manufacture a flag pole, while it takes another machine 9 minutes to manufacture the same flag pole. If both machines start at the same time, after how many minutes will the machines next begin manufacturing a flag pole at the same time again?

Answer 1

18 minutes

Explanation:

At the end of the 18th minutes, machine A would have completed 2 flagpoles and machine B will have completed 3 flagpoles. They both start producing another flagpole in the 19th minute

Answer 2

20 mins

Explanation: