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Question

How many spherical bullets can be made out of a solid cube of lead whose edge measures 4 cm, each bullet being 4 cm in diameter.

A
2
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B
3
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C
4
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D
5
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Solution

The correct option is A 2

Number of spherical bullets formed =Volume of cubeVolume of one spherical bullet
Volume of a cube=a3

Volume of a sphere =43πr3

As the diameter of the sphere is 4 cm, its radius r =2 cm.

Hence, number of spherical bullets formed =4×4×443×227×2×2×2=1.9092


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