Mensurationeasy · Past Paper
The total surface area of a hemisphere is 462 sq. cm. Find its radius.
A7 cm
B14 cm
C3.5 cm
D21 cm
✓ Correct Answer: A — 7 cm
3πr² = 462. 3 * (22/7) * r² = 462. (66/7) * r² = 462. r² = 462 * 7 / 66 = 7 * 7, so r = 7 cm.
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