Question 17
Mensuration of SolidsIf the total surface area of a solid hemisphere is equal to its volume, find the radius.
- A.3.0 cm
- B.4.5 cm
- C.5.0 cm
- D.9.0 cm
Show the answer and explanation
Answer: B (4.5 cm)
Explanation
Total surface area = 3πr² and volume = ⅔πr³. 3πr² = ⅔πr³ gives r = 4.5 cm.