SOLUTION: Tommy can paint a fence in 9 hours. If his friend Huck helps, they can paint the fence in 1 hour. How fast could Huck paint the fence by himself?
Question 1065119: Tommy can paint a fence in 9 hours. If his friend Huck helps, they can paint the fence in 1 hour. How fast could Huck paint the fence by himself? Answer by ikleyn(52767) (Show Source):
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Tommy can paint a fence in 9 hours. If his friend Huck helps, they can paint the fence in 1 hour. How fast could Huck paint the fence by himself?
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Tommy paints 1/9 of the fence in one hour.
Huck and Tommy together paint 1 fence in one hour.
Hence, Huck paints 1 - (1/9) = (9/9)-(1/9) = 8/9 of the fence per hour.
Thus, Huck can paint the fence in 9/8 hour or hours (1 hr and 7 min 30 sec).
