Question 98406
One roofer can put a neew roof on a house three times faster than another. Working together they can roof a house in 4 days. How long would it take the faster roofer working alone?  I need to know how to set up the problem then i can work it from there
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1st roofer DATA:
Time = x days/job ; Rate = 1/x job/day
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2nd roofer DATA:
Time = 3x days/job ; Rate = 1/3x job/day
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Working-together DATA:
Time = 4 day/job ; Rate = 1/4 job/day
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EQUATION:
rate + rate = together rate
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I'll let you solve it.
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Cheers,
Stan H.