A regular right pyramid has a square base with a side length of 12 cm. Its slant height is 10 cm. What is its volume?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 384 cm3.
Side length of square base = 12 cm
Height = √[102 − (12/2)2] = √[100 − 36] = √64 = 8 cm
Volume = (1/3) × Base Area × Height
= (1/3) × 122 × 8
= (1/3) × 144 × 8
= 384 cm3