The total surface area of a solid hemisphere of diameter 28 cm is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 1848 cm2.
The total Surface Area = 2πr2 + πr2 = 3πr2
here, r = radius
The diameter is given as 28 cm
r = Diameter/2
⇒ r = 28/2 = 14 cm
Now,
Total surface area(TSA) = 3πr2
⇒ 3 × 22/7 × 14 × 14
⇒ 3 × 22 × 14 × 2 = 1848 cm2