It would take 120 minutes to fill a swimming pool using water from 5 taps.

How many minutes will it take to fill the pool if only 3 taps are used?

State one assumption you made in working out your answer.

My answer was as follows:-

5 taps - 120 mins

1 tap - 120/5 = 24 mins

3 taps - 24 x 3 = 72 mins

I assumed that the same amount of water would flow from each tap.

But my answer can't be right because it would take longer for 3 taps to fill the pool than 5.

I'm confused!