SOLUTION: one pipe can empty a tank in 8 hours and a second pipe can empty the same tank in 6 hours. if the first pipe operates alone for 2 hours then the second pipe is put into operation,

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Question 837045: one pipe can empty a tank in 8 hours and a second pipe can empty the same tank in 6 hours. if the first pipe operates alone for 2 hours then the second pipe is put into operation, how man hours after the second pipe is opened will the tank empty?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
2/8+x/6+x/8=1
7x/24=18/24
x=18/7