Question

Answer the question​

Answer 1

Answer:

Dimensions :-

Outer Radius :- R = 4.4/2= 2.2cm

Inner Radius :- r = 4/2=2

Height = 77cm

1) Inner curver surface area :- S1 = 2πrh

2*22/7*2*77

=968cm2

2)Outer curved surface area :- S2 =2πRh

= 2*22/7*2.2*77

1064.8cm2

3)Total surface area= S1 + S2 + 2(Rings area)

968cm2 + 1064.8cm2+2( πR2 - πr2)

968 + 1064.8 + 2 * π ( R2- r2) {π Common}

968+ 1064.8 + 2 * 22/7 [ (2.2)2 - (2)2}

968 + 1064.8 + 5.28 cm2

= 2038.08 cm2

Answer 2

this is correct answer