Mathematics · Mensuration
From a solid cylindrical wooden block of height 30 cm, a right circular cone of the same height and same base radius is carved out. If the semi-vertical angle of the cone is 45°, find the sum of the areas of the internal and external surfaces of the remaining wooden block (in cm2).
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11800π
- 2900π(9 + √2)
- 3900π(3 + √2)✓
- 4900π
Correct answer
900π(3 + √2)
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