Posted by **mike** on Thursday, January 6, 2011 at 5:27pm.

tom can mow a lawn in 4 hours. perry can mow the same lawn in 5 hours. how long for them to mow the lawn together?

- Math -
**Ms. Sue**, Thursday, January 6, 2011 at 5:29pm
If you want a math tutor to help you, please type math in the school subject line.

- smith -
**Gita**, Thursday, September 10, 2015 at 10:48pm
(1/4)+(1/5)=9/20

Then in one hour they can do 20/9

60*20/9= 133 minutes

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