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 le

Question 488066: 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 lenght 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 lenght of time?
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Janice DATA:
time = 2 hrs/job ; rate = 1/2 job/hr
----
Friend DATA:
time = 2 hrs/job ; rate = 1/2 job/hr
---
Together DATA:
time = x hrs/job ; rate = 1/x job/hr
-----
Equation:
rate + rate = together rate
1/2 + 1/2 = 1/x
1/x = 1
x = 1 hr (time for them to do the job together)
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Cheers,
Stan H.
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