Find the volume of the cone in round figure. If the height and the slant height of a cone are 18 cm and 21 cm, respectively.
Show answer & explanation
Correct answer: B
Explanation
Given:
Height = 18 cm
Slant height = 21 cm
Radius² = 21 × 21 − 18 × 18
= 441 − 324
= 117
Volume of the cone = (1/3) × 3.14 × 117 × 18
= 3.14 × 702
= 2204.28 cubic cm
Volume as an integer = 2204 cubic cm