SOLUTION: Two people are painting a 10' by 8' wall. The first person paints the wall in 3 hours. The second person paints it in 2 hours. If they work together, how long will it take them to
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Question 877021: Two people are painting a 10' by 8' wall. The first person paints the wall in 3 hours. The second person paints it in 2 hours. If they work together, how long will it take them to paint the wall?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of painting to get
their rate painting together
1st person:
( 1 wall ) / ( 3 hrs )
2nd person:
( 1 wall ) / ( 2 hrs )
-----------------
Working together:
( 1 wall ) / ( t hrs )
------------------
Multiply both sides by
Note that hr = min
---------------
Working together, it will take
them 1 hr and 12 min
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