You can put this solution on YOUR website! Rey can do a story in 3 hours while Joe can do it in 5 hours.In how many hours can the two boys do the work , if they worked together?
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Let t = time required if they work together
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Let the completed job = 1 (1 story)
: + = 1
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Multiply equation by a multiple of the two denominators, 15 will do this:
15* + 15* = 15(1)
5t + 3t = 15
:
8t = 15
t =
t = 1.875 hrs or 1 hr 52.5 minutes
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Check solution, replace t with 1.875 in original equation: + = 1
.625 + .375 = 1.00
