Q. 115.0( 1 Vote )

# A spherical solid

Volume of sphere = r3

(18)3 = (2)3 + (12)3 + r3

(18)3 = [(2)3 + (12)3 + r3 ]

(18)3 = [(2)3 + (12)3 + r3 ]

5832 = 8 + 1728 + r3

5832 = 1736 + r3

5832-1736 = r3

4096 = r3

r =

r = 16 cm

Radius of the third sphere is 16 cm.

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