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(R2 - r2)h