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 762230: 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 josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Uniform rate, and the rate of each person when working together is additive using their rates.

Tommy: 1 job per 9 hours, rate is 1/9 jobs per hour.
Huck: 1/t jobs per hour, we do not know this t.
Tommy+Huck: 1 job per hour.

Look carefully that the units used here are as JOBS PER HOUR, where 1 job means, "paint the fence".

Rates of each are additive, as already said.

Find t.
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