Question

12. Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 ½ hours. How quickly can all three fill the pool together?

Answer 1

2 hrs 45 mins

Explanation:

30min + 45min = 1hr 15min + 1hr 30min = 2hrs 45mins

Answer 2

15 minutes

Explanation:

`(1)/(30)` +
`(1)/(45)` +
`(1)/(90)` =
`(3)/(90)` +
`(2)/(90)` +
`(1)/(90)` =
`(6)/(90)` =
`(1)/(15)`

All three can fill the pool in 15 minutes