Question

the outer diameter of a spherical shell is 10 cm and the inner diameter is 9 cm . find the volume of the metal used in the shell​

Answer 1

Three-dimensional objects

the outer diameter: 10 cm, r₁ = radius = 5 cm

the inner diameter: 9 cm, r₂ = 4.5 cm

volume of metal:

`\tt =(4)/(3)\pi(r_1^3-r_2^3)\\\\=(4)/(3)\pi(5^3-4.5^3)\\\\=141.952\:cm^3`