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Thursday, 14 May 2026
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If the total surface area of a solid hemisphere is equal to its volume, find the radius

If the total surface area of a solid hemisphere is equal to its volume, find the radius
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A 3.0cm
  • B 4.5cm
  • C 5.0cm
  • D 9.0cm
Correct Answer: Option B
Explanation:
T.S.A of hemisphere = 3\(\pi r^2\)
vol of hemisphere = \(\frac{2}{3} \pi r^2\)
3\(\pi r^2\) = \(\frac{2}{3} \pi r^2\)
3 = \(\frac{2}{3} \pi r\)
9 = 2r
r = \(\frac{9}{2}\)
r = 4.5cm

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