Question 38
Mensuration of SolidsA solid hemisphere has radius 7cm. Find the total surface area. [π = 22/7]
- A.400cm2
- B.462cm2
- C.66cm2
- D.308cm2
Show the answer and explanation
Answer: B (462cm2)
Explanation
The total surface is the curved part 2πr2 plus the flat circle πr2, i.e. 3πr2 = 3 × 22/7 × 49 = 462 cm2.