Question #73c96

1 Answer
MrsRudolph221
Aug 22, 2017

I use a "model" like this: #T/(A1)+T/(A2) =1# where T = together time, and A1 and A2 represent the different alone times, and there is 1 job to be done.

Explanation:

Therefore, #(T/8)+(T/4)=1#
Multiply both sides by 8: #8(T/8+T/4)=(1)8#

So, T + 2T = 8, 3T = 8, so T = #8/3# hours or 2 and#2/3# hours.

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