SOLUTION: Bob paints a house in 3 hours. Charlie paints a house in 5 hrs. How long would it take for them to paint it together ?

Question 700854: Bob paints a house in 3 hours. Charlie paints a house in 5 hrs. How long would it take for them to paint it together ?
Answer by neatmath(302) (Show Source): You can put this solution on YOUR website!

This is a pretty standard rate of work problem.

We just need to set up a simple equation.

In words, if Bob can do 1/3 of the job in 1 hour,

and Charlie can do 1/5 of the job in 1 hour,

what percentage of the job could they do working together in 1 hour?

This means they could do of the work in 1 hour.

Thus, working together, Bob and Charlie can do the work in 1.875 hours!

This is about 1 hour 52 minutes 30 seconds, which makes sense!

I hope this helps! Keep practicing! :)

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