SOLUTION: It takes a groundskeeper 45 minutes to prepare a Little League baseball field for a game. It takes his assistant 65 minutes to prepare the same field. How long will it take if they

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Question 859405: It takes a groundskeeper 45 minutes to prepare a Little League baseball field for a game. It takes his assistant 65 minutes to prepare the same field. How long will it take if they work together to prepare the field?

Answer____min?
I don't understand word problems that much!
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Their rates working together are additive. Use the rates as units of FIELD per MINUTE.

1%2F45%2B1%2F65=CombinedRate
1%2F%283%2A3%2A5%29%2B1%2F%285%2A13%29

%2813%2B9%29%2F%283%2A3%2A5%2A13%29
22%2F%283%2A3%2A5%2A13%29
highlight%2822%2F585%29 Fields Per Hour

Viewed as the reciprocal, this is nearly 27 hours for one field.