Question

What would you have to do to change 10 cubic feet into cubic inches? 

A. Multiply by 1,728   B. Multiply by 46,656   C. Divide by 1,728   D. Divide by 46,656

Answer 1

1 ft = 12 inches
(1 ft)^3 = (12 inches)^3
1 cubic foot = 1728 cubic inches

You'll multiply by the conversion factor (1278 in^3)/(1 ft^3) to convert from cubic feet to cubic inches. Notice how the cubic feet ft^3 unit is at the bottom of the conversion fraction, so that the cubic feet units cancel.

Answer: A) multiply by 1728