Problema Solution
6. George and Stanley are building a stone fence. They can complete the fence together in 8 hours, and George can complete it is 24 hours working alone. If they work together for 6 hours, then Stanley goes to the pub for a pint, how much longer must George work to finish the fence?
Answer provided by our tutors
let
t = the time that George works alone to finish the fence
1/8 fence per hour is the together rate
1/24 fence per hour is the rate of George
6*(1/8) + t(1/24) = 1
by solving we find:
t = 6 hr
click here to see the step by step solution of the equation:
George must work 6 hours longer to finish the fence.