SSC CPO SI and ASI Model Paper 7

Question : 108 of 200

Marks: +1, -0

A solid metallic cone of height 20 cm, radius of base 40 cm is melted to make spherical balls each having diameter 8 cm. Find the number of such balls that can be made.

Validate

Solution:

(2) Required number of sphericalballs =

{Volume of cone}/{Volume of ball}

={1 / 3π r^2 h}/{4 / 3π r^3}

={1/3×22/7×40×40×20}/{4/3×22/7×4×4×4}=125

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