Question

the diameter of a closed cylinder is 22 cm and height is 12 cm find the total surface area of the cylinder
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Answer 1

Answer:

T.S.A. of cylinder=

$2\pi r(r + h) \\ \\ = 2 \times \frac{22}{7} \times 11(11 + 10)$

Wait a second

How 11 came as radius.

Reason:

As we know that diameter is 22 cm so radius is

$\frac{22}{2} = 11$

So let's continue..

$= 2 \times \frac{22}{7} \times 11(21) \\ \\ = 2 \times 22 \times 11(3) \\ \\ = 44 \times 11(3) \\ \\ = 484(3) \\ \\ = 1452$

Ao answer is

${1452cm}^{2}$

Hope it helps you from my side :)

Answer 2

HOPE IT HELPS YOU(≡^∇^≡)