# Math Word Problem Riddle!?

Joe and John have the same car. It takes 2 hrs for John to paint his car, and it takes joe 3 hrs to paint his car. How long would it take for them to paint one car together? Can u also show me how you figure it out?

Update:

and i have another one........ John can type a paper in 50 min. John and JOE can type a paper togther in 30 min. How long does it take JOE to type a paper by himself........ how do you do this one?

### 2 Answers

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- icemanLv 78 years agoFavorite Answer
1/2 + 1/3 = 1/t

5/6 = 1/t

t = 6/5 hr

Re: Additional details:

let x = the time it take JOE to type a paper by himself in minutes

1/50 + 1/x = 1/30

1/x = 1/30 - 1/50

1/x = (5 - 3)/150

1/x = 2/150

x = 75 minutes

Regards.

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