Dimensions be :
⇒R= Outer radius =4.42=2.2cm
r= Inner radius 42=2cm
Height h=77cm
⇒ Inner curved surface area =2πrh
=2×227×2×77
=968cm2
⇒ Outer curved surface area =2πRh
=2×227×4.2×77
=1064.8cm2
⇒ Total surface area =968+1064.8+2π×Ring′sarea
=968+1064.8+2×[πR2−πr2]
=968+1064.8+2×[227×(2.2)2−227×(2)2]
=968+1064.8+2×227×[(2.2)2−(2)2]
=968+1064.8+5.28
=2038.08
⇒ Total surface area =2038.08cm2.
Hence, the answer is 2038.08cm2.