biltwell construction needs to create a concrete foundation 5 ft deep measuring 60 ft by 32 ft, outside dimensions, with walls 7 in. thick. How many cubic yards if concrete will they need?

Question

math, algebra

Answer 1

60 by 32 feet on the outside

by 5 feet deep, by 7/12 ft thick wall

= 60x5x7/12x2 + (32-14/12)x5x7/12x2

= 35 + 6475/36

= 213 7/36 cubic feet

= (213 7/36)/27 cubic yards

= about 7.84 yd^3

= about 8 cubic yards