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Question

A solid sphere of radius 6 mm is melted and then cast into small spherical balls each of radius 0.6 mm. Find the number of balls thus obtained.

A
1000
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B
2000
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C
4000
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D
3000
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Solution

The correct option is A 1000
Let number of small balls be x
Therefore Volume of x small balls = volume of sphere
x=6×6×60.6×0.6×0.6=2160.216
x=1000
Number of balls = 1000

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