Two mechanics worked on a car. The first charged $115 per hour and the second charged $80 per hour. The mechanics worked for a combined total of 20 hours and together they charged a total of $1775. How long did each mechanic work ?
Accepted Solution
A:
Total cost is 3,900. 115 x 20 = 2,300. 80 x 20 = 1,600. 2,300 + 1,600 = 3,900.