Ed can paint a 1 story house in 12 hours. This is 2/3 of Dave's speed. What is Dave's speed?

Question

 Not sure how to set up the problem

Answer 1

Ed paints i/12 of the house per hour.

 

Ed's speed = (2/3)(Dave's speed)

 

Dave's speed = (3/2)(Ed's speed) = (3/2)(1/12) = 1/8 

 

So, Dave can paint the house in 8 hours.