Question

A mason's assistant's rate of pay is $0.95 per cubic foot of earth moved. he digs a trench 2.5 ft. wide by 2 ft. deep by 150 ft. in length. what is his pay for this job?

Answer 1

Well well if he gets paid. $0.95 per ft^3 this equates to:
pay = $0.95 * volume

because the volume is the amount of ft^3

a trench shape would be considered rectangular. The the volume of rectangle is :
volume = length * width * height

so:
v = 2.5 ft * 2 ft * 150 ft
v = 750 ft^3

so:
pay = 0.95 $/ft^3 * 750 ft^3

p = $712.50