Height of hollow cylinder =14 cm

Let the radius of outer radius be ‘R’ cm

Let the radius of inner radius be ‘r’ cm

Difference between inner and outer Curved surface area = 88 cm

Curved surface area of hollow cylinder = 2π(R - r)h

⇒ 2π(R – r)h = 88

⇒ R - r = \(\frac{{88}\times{7}}{{2}\times{22}\times{14}}\)

⇒ R – r = 1 ……… (1)

Volume of metal = 176

Height of hollow cylinder = 14 cm

Volume of hollow cylinder (metal) =π(R^{2} - r^{2})h