Question

The diameter of a cylinder is 7 cm and its height is 16 cm. Find
(i) lateral surface area of the cylinder.
(ii) total surface area of the cylinder.
nlutinn Letr be the radius and h be the height of the given cylinder,​

Answer 1

Given :-

• Diameter of cylinder (d) = 7cm
• Radius (r) = 7/2 cm
• Height (h) = 16 cm

To Find :-

• L.S.A of cylinder
• T.S.A of cylinder

Solution :-

We know ,

L.S.A of cylinder = 2πrh

→ ${2 × \dfrac{22}{7} × \dfrac{7}{2} × 16 }$

→ 22 × 16

→ 352 cm²

And,

T.S.A of cylinder = 2πr ( h + r )

→ ${2 × \dfrac{22}{7} × \dfrac{7}{2} ( 16 + 3.5) }$

→ 22 × 19.5

→ 429 cm²