Mathematics · Geometry
Three equal balls of 5 cm in diameter lie on a floor so as to touch one another, and a fourth ball of equal radius is placed on top of them. The height of the centre of the fourth ball above the floor in cm is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 15(√(2/3) + 1/2)✓
- 25(2√(2/3) + 1)
- 35(√(2/3) + 1/3)
- 4(50/3 + 5/2)1/2
Correct answer
5(√(2/3) + 1/2)
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