Martha in 2 hours = 1 room
Martha in 1 hour = 1/2 room.
As like the Martha,
Jamie in 1 hour = 1/6 room.
Both together,
[tex] \frac{1}{2} + \frac{1}{6} \\ \frac{3 + 1}{6} = \frac{4}{6} = \frac{2}{3} \\ = 0.6666...[/tex]
= 0.67 hours to paint a room.
!! Hope It Helps !!
