SOLUTION: Biff can mow 3 rugby fields in 10 hrs. Marty can mow 2 rugby fields in 7 hours. If they work together, how long would it take them to mow 10 rugby fields?

Question 1176004: Biff can mow 3 rugby fields in 10 hrs. Marty can mow 2 rugby fields in 7 hours. If they work together, how long would it take them to mow 10 rugby fields?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Biff can mow 3 rugby fields in 10 hrs. Marty can mow 2 rugby fields in 7 hours. If they work together, how long would it take them to mow 10 rugby fields?
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B does 3/10 fields/hour
M does 2/7 fields/hour
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Add those, then divide 10 by the sum.
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