Multiple choice softskills communication

A right triangle with sides 3 cm, 4 cm and 5 cm is rotated about the side of 3 cm to form a cone. The volume of the cone so formed is:

  1. 12 PI cm3

  2. 15 PI cm3

  3. 16 PI cm3

  4. 20 PI cm3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rotating a right-angled triangle with sides 3 cm, 4 cm, and 5 cm about the 3 cm side forms a cone where the radius is 4 cm and the height is 3 cm. The volume of a cone is (1/3) * pi * r^2 * h = (1/3) * pi * 16 * 3 = 16 pi cubic cm.

Keep practicing — related questions