Question 31
Mensuration of SolidsThe volume of a cone of height 18 cm is 8,316 cm3. Find the base radius of the cone. [Take π = 22/7]
- A.21 cm
- B.14 cm
- C.28 cm
- D.42 cm
Show the answer and explanation
Answer: A (21 cm)
Explanation
⅓ × 22/7 × r² × 18 = 8316 gives r² = 441, so r = 21 cm.