Question

A rectangular pyramid has a volume of 1,512 inches cubed, a height of 12 in., and a base length of 21 in. What is the width of its base?
a. 2
b. 6
c. 12
d. 18

Answer 1

Volume of rectangular pyramid is,

$volume = \frac{base length \times base width \times height}{3} \\ 1512 = \frac{21 \times basewidth \times 12}{3} \\ basewidth = \frac{1512 \times 3}{21 \times 12} \\ basewidth = 18 \: inch$

Answer 2

Answer:

D. 18 is the answer of this question