marcus lays a slab of concrete in 9 hours. Tony lays the same size slab in 6 hours. If both work on the job and the cost of labor is $47.00 per hour, decide what the labor estimate should be

Answer 1

1/9 + 1/6 = 1/t, t= time it takes for both working together

multiply both sides by 18t to eliminate the fractions

2t + 3t = 18

5t = 18

together they can lay the slab in 18/5 = 3.6 hours

3.6 x 47 = $169.20 labor estimate for the job if both work together