The total surface area of a solid hemisphere of diameter 14 cm is (use π= ):
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 462 cm2 .
Diameter = 14 cm ⇒ Radius (r) = 7 cm
Use π = 22/7
Total Surface Area of Solid Hemisphere =
Curved Surface Area + Base Area
= 2πr² + πr² = 3πr2
Now,
3πr² = 3 × (22/7) × 7² = 3 × (22/7) × 49
= 3 × 22 × 7 = 462 cm2