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
A.
1 hour
B.
1.5 hours
C
D.
4.5 hours