Problema Solution
it takes painter A 3 hours to paint a certain area of a house. It takes painter B 5 hours to do the same job. How long would it take them working together to do the same job?
Answer provided by our tutors
A paints 1/3 of the house per hour.
B paints 1/5 of the house per hour.
A & B paint 1/3 + 1/5 per hour = 8/15 houses/hr
--> 15/8 hours/house