SOLUTION: A swimming pool is filled in 30 hours by 2 identical pumps. How much quicker would it be filled if 5 similar pumps were used instead.
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Question 851629: A swimming pool is filled in 30 hours by 2 identical pumps. How much quicker would it be filled if 5 similar pumps were used instead.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/x+1/x=1/30
2/x=1/30
60=x
each pump takes 60 hours alone
now with 5 pumps
5/60=1/x
1/12=1/x
x=12 hours with 5 pumps
30-12=18 hours quicker.
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