Question 728073
craig and jim,working together, can clean the house in 2 hours. Working alone, jim takes twice as long as craig. How long does it take craig to clean the house alone?
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Let jim's rate be 1/x job/hr
Then craig's rate is 1/(2x) job/hr
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Together rate = 1/2 job/hr
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Equation:
rate + rate = together rate
1/x + 1/(2x) = 1/2
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2 + 1 = x
x = 3 hrs (time for Jim)
2x = 6 hrs (time for craig)
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cheers,
Stan H.