Question

twelve solid sphere of the same size are made by melting a solid metalic cylinder of base diameter 2cm and height 16cm. The diameter of each sphere.

Answer 1

Volume remains the same always irrespective of the shapes

volume of the cylinder = Pi * r^2 * h
volume of the sphere = (4/3) * Pi * R^3

 Pi * r^2 * h = 12 * (4/3) * Pi * R^3
        1 * 16 =  12*(4/3)*R^3
    R = 1cm
Diameter of the sphere is 2 cm