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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?

Respuesta :

Matthewf25

Answer:

2 hrs 45 mins

Step-by-step explanation:

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

xenia168

Answer:

15 minutes

Step-by-step explanation:

[tex]\frac{1}{30}[/tex] + [tex]\frac{1}{45}[/tex] + [tex]\frac{1}{90}[/tex] = [tex]\frac{3}{90}[/tex] + [tex]\frac{2}{90}[/tex] + [tex]\frac{1}{90}[/tex] = [tex]\frac{6}{90}[/tex] = [tex]\frac{1}{15}[/tex]

All three can fill the pool in 15 minutes

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