SOLUTION: Jack usually mows his lawn in 5 hours. Marilyn can mow the same yard in 3 hours. How much time would it take for them to mow the yard together?

Question 474238: Jack usually mows his lawn in 5 hours. Marilyn can mow the same yard in 3 hours. How much time would it take for them to mow the yard together?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = time to mow 1 lawn working together
Add their rates of working
Jack's rate:
1 lawn mowed / 5 hours
Marilyn's rate:
1 lawn mowed / 3 hours
Rate working together =
Rate working together =

hrs
Time - 1 hr + min
It takes them 1 hr and 52.5 min working together
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