Question

martha can paint a room in 8 hours. jamie can paint the same room in 4 hours. how long to the nearest tenth of an hour will it take them to paint the room together

Answer 1

in 1 hr martha finishes 1/8th of the room

in 1hr jaime finishes 1/4th of the room

combined in 1hr they can finish (1/8 + 1/4) = 3/8th of the room.

for painting the whole room both of them together it takes the 8/3 hrs = 2.67hr