SOLUTION: Janice can mow the lawn in 2 hours. Her friend can mow the same lawn in 2 hours. How long would it take them to mow the lawn if they had two lawn mowers and worked for the same len
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Question 404386: Janice can mow the lawn in 2 hours. Her friend can mow the same lawn in 2 hours. How long would it take them to mow the lawn if they had two lawn mowers and worked for the same length of time? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Janice can mow the lawn in 2 hours. Her friend can mow the same lawn in 2 hours. How long would it take them to mow the lawn if they had two lawn mowers and worked for the same length of time?
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Janice DATA:
time = 2 hrs/job ; rate = 1/2 job/hr
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Friend DATA:
time = 2 hrs/job ; rate = 1/2 job/hr
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Together DATA:
time = x hrs/job ; rate = 1/x job/hr
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Equation:
rate + rate = rate
1/2 + 1/2 = 1/x
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x + x = 2
2x = 2
x = 1 hr (time for them to do the job together)
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Cheers,
Stan H.
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