Question

A copper sphere of diameter 6 centimetre is melted and drawn into 36 cm long wire of uniform circular cross section then its radius is​

Answer 1

Answer:

vol of Coppersphere 4/3πr 3

4xπx3^3/3 = 36π

Vol. of wire of length36 Cm

= πr 2x36=36 π

r2=36π/36π = 1

r = 1 cm

radius of wire =1cm