Question 126410: Ron can paint a room in 6 hours working alone. If his son, Jason, helps him, the job takes 4 hours. How long would it take Jason to do the job alone?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Ron can paint a room in 6 hours working alone. If his son, Jason, helps him, the job takes 4 hours. How long would it take Jason to do the job alone?
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Ron DATA;
Time = 6 hrs/job ; Rate = 1/6 job/hr
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Jason DATA:
Time = x hrs/job ; Rate = 1/x job/hr
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Together DATA:
Time = 4 hrs/job ; Rate = 1/4 job/hr
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EQUATION:
rate + rate = together rate
1/6 + 1/x = 1/4
(x+6)/6x = 1/4
4x+24 = 6x
2x = 24
x = 12 hrs (Time for Jason alone)
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Cheers,
Stan H.
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