Mensurationhard · Past Paper
A spherical ball of radius 3 cm is melted and recast into three spherical balls. The radii of two of the balls are 1.5 cm and 2 cm. Find the radius of the third ball.
A2.5 cm
B3 cm
C2.7 cm
D2.2 cm
✓ Correct Answer: A — 2.5 cm
3³ = 1.5³ + 2³ + r³. 27 = 3.375 + 8 + r³. r³ = 15.625. r = 2.5 cm.
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