The radius of a cone is 10 m, height 21 m. The volume of the cone is: Choices:
A) 2200
B) 1100
C) 5500
D) 3300
E) 1050

Rationale: 1 / 3 π rh = 1 / 3 × 22 / 7 × 100 × 21 = 2200 m ( power 3 ) answer is a .
Answer: A