Problema Solution
Barry can mow the lawn in 3 hours. When Barry and Dan work together it takes 1 hour. How long would it take Dan to mow the lawn?
Answer provided by our tutors
Let 'd' represent the number of hour that Dan needs to mow the lawn alone.
1/d lawns per hour is Dan's rate
1/3 lawn per hour is Barry's rate
1 lawn per hour is the together rate
1/d + 1/3 = 1
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click here to see the equation solved for d
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d = 1,5 hr
Dan can mow the lawn in 1.5 hours.