Mensurationeasy · Past Paper
Find the radius of a sphere whose surface area is 154 sq. cm.
A7 cm
B3.5 cm
C14 cm
D10.5 cm
✓ Correct Answer: B — 3.5 cm
4πr² = 154. 4 * (22/7) * r² = 154. r² = 154 * 7 / 88 = 12.25. r = 3.5 cm.
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