2. If Sally can paint a house in 4 hours, and John can paint the same house

E

Elijah's mum

New member
in 6 hour, how long will it take..? 2. If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?

A. 2 hours and 24 minutes
B. 3 hours and 12 minutes
C. 3 hours and 44 minutes
D. 4 hours and 10 minutes
E. 4 hours and 33 minutes

I know the answer, but I don't understand how it is found so please show the work too. thanks
 
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