Question

Find the surface area of the can of milk at the right.
`\bold{Use \: π = 3.14}`
`\red{*}`

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Answer 1

Surface area of cylindrical milk can is 43.96cm²

Explanation:

Given :-

• height of can of milk :- 6cm
• diameter :- 2 cm , radius :- 1cm

To find:-

• Surface area of milk can

Solution:-

formula for surface area cylindrical milk can :-

2πr(h+r)

putting the known values ,

2 × 3.14 × 1 (6+1) cm²

Surface area :- 43.96 cm²

Answer 2

• The Surface area of milk can is 43.96cm²

Solution:

The milk can is in the shape of a cylinder.

The surface area of cylinder is defined as the sum of curved surface and the two circular bases of the cylinder;

‎ㅤ‎ㅤ‎ㅤ➙ (curved surface ) + 2(base area )

‎ㅤ‎ㅤ‎ㅤ➙ 2πrh + 2πr²

‎ㅤ‎ㅤ‎ㅤ➙ 2πr( h + r )

Here, in this question we have;

• radius ( r ) = 2/2 = 1 cm

• height ( h ) = 6 cm

Therefore, Surface Area ( S.A ) :

➝ S.A = 2πr( r + h )

➝ S.A = 2 × π × 1 ( 1 + 6 )

➝ S.A = 2π ( 7 )

➝ S.A = 2 × 3.14 × 7

➝ S.A = 14 × 3.14

➝ S.A = 43.96cm²