Question 286279
x/3+x/5=1
5x+3x=15
8x=15
x=15/8= 1 7/8 hours
15/8/3=5/8
15/8/5=3/8
Jim did 5/8 and Jane did 3/8 of the room
15/8*60=15*4*15/8=225/2=112.5 minutes=1 hour 52.5 minutes