Examples of Math Problems: Ken mower can mow hi slawn in 20 minutes his son can do it in 12 minutes how long will it take if they do it together?

Wednesday, August 21, 2013

Ken mower can mow hi slawn in 20 minutes his son can do it in 12 minutes how long will it take if they do it together?

essentially we are to add:
%0D%0A1%2F20%2B1%2F12=1%2Ft%0D%0A

%0D%0A1%2F20%2B1%2F12=1%2Ft%0D%0A

t=%2820%2A12%29%2F%2820%2B12%29=7%261%2F2

minutes

:)

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