Question

Martha can paint a room in 2 hours. Jamie can paint the same room in 6 hours. How long, to the nearest tenth of an hour, will it take them to paint the room together?

Answer 1

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,

`(1)/(2) + (1)/(6) \\ (3 + 1)/(6) = (4)/(6) = (2)/(3) \\ = 0.6666...`
= 0.67 hours to paint a room.

!! Hope It Helps !!