Abbie paints twice as fast as Beth and three times as fast as Cathie. If it takes them 60 min to paint a living room with all 3 working together, how long would it take Abbie if she works alone?
So far this is what I got:
Rate Distance Time
Cathies 3x 1 1/3x
Beth 2x 1 1/2x
Abbie x 1 1/x
I then did (1/2x)+(1/3x)+(1/x)=1
Can someone explain to me where I keep going wrong? Thanks