SOLUTION: Jeff and Kirk can build a 75 ft wall together in 3 hours. Jeff has more experience, he could build the wall by himself 1 hour quicker than Kirk. How long would it take Kirk to buil

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Question 1165520: Jeff and Kirk can build a 75 ft wall together in 3 hours. Jeff has more experience, he could build the wall by himself 1 hour quicker than Kirk. How long would it take Kirk to build the wall by himself?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
                RATE

Kirk            1/k

Jeff            1/(k-1)

Together        1/3

.
.
.
k%5E2-7k%2B3=0
.
k=%287%2Bsqrt%287%5E2-4%2A3%29%29%2F2
.

highlight%28k=6.54%2Ahours%29

About 6 hours 32 minutes