# 3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

2
by ayush115

## Answers

2015-11-12T14:22:53+05:30

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Let the required number of working hours per day be x
.
More pumps, Less working hours per day (Indirect Proportion)
Less days, More working hours per day (Indirect Proportion)
Pumps4:3:: 8 : x
Days1:2
:: 8 : x
4 x 1 x x = 3 x 2 x 8
x =(3 x 2 x 8)(4)
x = 12.
2015-11-12T15:15:05+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
3 pumps worked for a total of  3 * 8 hrs/day * 2 days = 48 hours

4 pumps must work for 48 hours...  so  each one for  48/4 = 12 hours
(in one day)
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