Find the volume of a cone of radius 3.5cm and vertical height 12cm. [Take π = 22/7]
A
15.5cm\(^3\)
B
21.0cm\(^3\)
C
142cm\(^3\)
D
154cm\(^3\)
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
volume of a cone = ⅓ \pi r2h → \(\frac{1*22*3.5*3.5*12}{3*7}\)
= 154cm\(^3\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #65391)