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Using a new lawn mower, Abby can mow the lawn in 2 hours. Her sister Carla used an older lawn mower and takes 3 hours to mow the same lawn. How long will it take them if they work together?
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Using a new lawn mower, Abby can mow the lawn in 2 hours. Her sister Carla used an older lawn mower and takes 3 hours to mow the same lawn. How long will it take them if they work together?

User Wonderman
by
8.4k points

1 Answer

3 votes
So rates are the lower number of a fraction.

So it would be:
(x)/(3) + (x)/(2) = 1 Then cross muitply.

2x + 3x = 6

5x=6

x=
(6)/(5) hours

User Adrian White
by
8.3k points
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