Question

a spherical ball of radius r is melted to make 8 new identical balls each of radius r, then find the radius of r:r1

Answer 1

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Volume of bigger ball = 8 × volume of smaller ball

4/3πr³

r3 = (2r1)3 = 8 × 4/3 πr³1

r³ = (2r1)³

r = 2r1

r : r1 = 2 : 1