SOLUTION: Mr. Rey asked Ben to finish a house repair job in 3 days. Ben knows that he can do it in 5 days. If Ben hires a helper, how fast can the helper work to finish the house repair in 3
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-> SOLUTION: Mr. Rey asked Ben to finish a house repair job in 3 days. Ben knows that he can do it in 5 days. If Ben hires a helper, how fast can the helper work to finish the house repair in 3
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Question 1009048: Mr. Rey asked Ben to finish a house repair job in 3 days. Ben knows that he can do it in 5 days. If Ben hires a helper, how fast can the helper work to finish the house repair in 3 days? Answer by fractalier(6550) (Show Source):
You can put this solution on YOUR website! The set up looks like this:
3/5 + 3/B = 1
where B is the time it takes the helper by himself...
Solve this a couple of ways...let's multiply by 5B and get
3B + 15 = 5B
15 = 2B
B = 7.5 days
