Question 945014
Phyllis can rake our lawn in 50 minutes and I can do it in 40 minutes. If she rakes for five minutes before I join her, how long will take for us to finish?
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General idea: rate*time = work done
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Phyllis's rate:: 1/50 job/min
My rate:: 1/40 job/min
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Equation:
work + work = work done
(1/50)*5 + (1/40)x = 1
40*5 + 50x = 40*50
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200 + 50x = 2000
50x = 1850
x = 37 minutes (time for me to finish the job)
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Cheers,
Stan H.
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