NIFT UG 2015 Question Paper with solutions

Question : 56 of 150

Marks: +1, -0

A copper sphere of radius 6 cm is melted to form spheres of radius 2 cm. How many such spheres are formed?

Solution:

Number of sphere of radius 2 cm

n={4/3π(6)^3}/{4/3π(2)^3}=27

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