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Q.
A cylindrical rod of iron, whose height is equal to its radius, is melted and cast into spherical balls whose radius is half the radius of the rod. Find the number of balls.
A.
3
B.
4
C.
5
D.
6
View Answer
Correct choice: D
Explanation:
Volume of rod = πr2h = πr2×r = πr3 Volume of one spherical ball =r/2 Volume of the spherical ball = 4/3πr3/8 Number of balls=Volumeof rod/volumeof one ball
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