Question

HELP HELP HELP Sally can paint a room in 4 hours. Joe can paint a room in 6 hours. How

long will it take if they paint the room together? I’m not sure if it’s 1.4

Answer 1

Answer: 2.4 hours

Explanation:

1/4 1/6

LCM

3/12+2/12=5/12 repricical 12/5 =2.4

Answer 2

2 hrs, 24 min

Explanation:

Sally: in one hour, she can paint 1/4 of the room.

Joe: in one our, he can paint 1/6 of the room

Hour one: 1/4+1/6=3/12+2/12=5/12

1÷5/12=1*12/5=12/5

12/5= 2 & 2/5 hours, or 2.4 hours, or 2 hrs 24 minutes