SOLUTION: Two pumps of different sizes, working together, can empty a tank in 7 hours. The larger pump can empty the tank in 4 hours less than the smaller pump. If the larger pump is out of
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-> SOLUTION: Two pumps of different sizes, working together, can empty a tank in 7 hours. The larger pump can empty the tank in 4 hours less than the smaller pump. If the larger pump is out of
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Question 820649: Two pumps of different sizes, working together, can empty a tank in 7 hours. The larger pump can empty the tank in 4 hours less than the smaller pump. If the larger pump is out of order, how long will it take the smaller pump to complete the job?
You can put this solution on YOUR website! 7/x+7/(x-4)=1
1/53 (x-9)^2 = 1
x = 1.7199
x = 16.280
It looks like there are two positive answers but remember that we must subtract 4 to get the smaller pumps time.
x = 16.280
x-4 = 12.280
