Edie can paint a wall in 3 hours. Dan can paint the same wall in 6 hours. if they work together, how many hours will it take Edie and Dan to paint the wall?

A.

1 hour

B.

1.5 hours

C.

2 hours

D.

4.5 hours

Eddie can paint 1/3 in an hour

Dan can paint 1/6 wall in an hour

2/6 + 1/6 = 1/2

Together, they can paint 1/2 wall in an hour

1/2 x 2 = 2

Therefore they would paint the whole wall in 2 hours, so the answer's C.

The answer is C.

The rest of the answers are

1. A

2. B

3. A

4. D

5. B

6. D

7. A

8. B

9. C

10. D

11. C

12. C