SOLUTION: 1. A full bathtub will empty at an average rate of 10 minutes. It will fill up to full at an average rate of 8 minutes if the plug is in. How long will it take to fill up to full i
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Question 389012: 1. A full bathtub will empty at an average rate of 10 minutes. It will fill up to full at an average rate of 8 minutes if the plug is in. How long will it take to fill up to full if the plug is removed and the tap is turned on?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
A full bathtub will empty at an average rate of 10 minutes. It will fill up to full at an average rate of 8 minutes if the plug is in. How long will it take to fill up to full if the plug is removed and the tap is turned on?
...
filling 8 minutes
1/8 of the job in 1 minute.
...
emptying 10 minutes
1/10 of this job in 1 minute.
..
1/8 -1/10 = effective filling in 1 minute
LCD = 40
(5-4)/40=1/40 of the job of filling in 1 minute.
So when plug is open it will take 40/1 minutes
40 minutes to fill the tub.
...
m.ananth@hotmail.ca
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