The base of a right pyramid is an equilateral triangle with side 8 cm, and its height is 30√3 cm. The volume (in cm3) of the pyramid is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 480.
The volume of the pyramid = 1/3 × area of base × height
Area of base = area of an equilateral triangle = √3/4 × 8 × 8 = 16√3.
Volume = 1/3 × 16√3 × 30√3
= 480cm3