A hemisphere has a radius of 6.2 cm. Find its total surface area (use π = 3.14) (round off to two decimal places).
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 362.10 cm2.
The formula for the total surface area (TSA) of a hemisphere,
TSA = 2πr2 + πr2 = 3πr2
here, r = radius
Now, on putting the values
TSA = 3 × 3.14 × 6.2 × 6.2 = 362.10 cm2