A metallic sphere of radius 12 cm is melted and drawn into a wire, whose radius of cross section is 16 cm. What is the length of the wire?

Math Mcqs / By Hanan

A metallic sphere of radius 12 cm is melted and drawn into a wire, whose radius of cross section is 16 cm. What is the length of the wire?

A. 45 cm

B. 18 cm

C. 90 cm

D. None of these

Explanation:

Volume of the wire (in Cylindrical shape) is equal to the volume of the sphere.

π(16)2 * h = (4/3)π (12)3 => h = 9 cm

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