Question

The diameter of metallic sphere is 4.2cm what is the mass of the sphere if density of metal is, 8.9g/cm3

Answer 1

volume of the sphere = 4/3πr^3
= (4/3)×(22/7)×(2.1)^3
= 38.8cm^3
but, density = 8.9
m/v = 8.9
m/38.8 = 8.9
m = 345.32g