Question

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

Answer 1

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.