Sally can paint a room in 3 hours while it take steve 8 hours to paint the same room. How long would it take for them to pain the room is they worked together?

Question

room

 

Answer 1

Sally paints (1/3)rd of the room in an hour and Steve (1/8)th.

Together they paint (1/3) + (1/8) = (11/24) of the room in 1 hr.

Thus they paint the room in (24/11) hrs. i.e. 2hrs and about 12 mins.

Answer 2

t represents time working together

 

t/3 + t/8 = 1

8t + 3t = 24   Multiply both sides by LCD, 24

11t = 24

t = 24/11 hour