Find the volume of a cone of radius 3.5cm and vertical height 12cm [Take \pi = 22/7]
A
3.4cm3
B
15.5cm3
C
21.0cm3
D
42.0cm3
E
154.0cm3
Verified Correct Answer: E.
Step-by-Step Mathematical Solution
The volume of a cone = \(\frac{1}{3}\) x \(\pi\) x r\(^2\) x h
= \(\frac{1}{3}\) x \(\frac{22}{7}\) x \(\frac{7}{2}\) x \(\frac{7}{2}\) x 12 = 154cm\(^3\)
Source: Myschool Past Questions Archive (Record #22406)