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

Answer:

2 hrs 45 mins

Step-by-step explanation:

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

Answer 2

Answer:

15 minutes

Step-by-step explanation:

$\frac{1}{30}$ + $\frac{1}{45}$ + $\frac{1}{90}$ = $\frac{3}{90}$ + $\frac{2}{90}$ + $\frac{1}{90}$ = $\frac{6}{90}$ = $\frac{1}{15}$

All three can fill the pool in 15 minutes