If the total surface area of a hemisphere is 192π cm2, then the radius of the base of the hemisphere is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1, i.e., 8 cm.
Total surface area of a hemisphere = 3 × π × r2
3 × π × r2 = 192 × π
Divide both sides by π:
3 × r2 = 192
Divide both sides by 3:
r2 = 64
Take the square root:
r = 8 cm