Math in the Workplace: Overview

Math in the Workplace - Measurements

Problem:

You need to pour a new sidewalk that is 4' wide, 16' long, and 4" thick. Concrete costs $70.00/cubic yard.

1. How many cubic yards of concrete are required?

2. How much will the concrete cost?

Solution:

1 cubic yard = 27 cubic feet (ft³)
1 cubic foot = 3 ft²
1 cubic yard = 81 ft²
4 inch = 1/3 foot

4 ft  x  16 ft  x  1/3 ft  =  21.3 ft³

21.3 ft3 x

1 yd3 27 ft3

= 0.79 cubic yards needed

.79 cubic yards x $70.00 / cubic yard = $55.30

Math in the Workplace: Overview