A spherical ball of radius 6 cm is melted and recast into 3 spherical balls. The radii of two of them are 3 cm and 4 cm. Find the radius of the third ball (in cm).
Class 10Volume of Combined SolidsMensuration
A6
B10
C4
D5
Step-by-Step Solution
Volume conserved: 63=33+43+r3⇒216=27+64+r3⇒r3=125⇒r=5 cm.
Answer: D) 5
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