Question

find the curved surface area and total surface area of a cylinder of radius 21 cm and height of 5 cm​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Curved surface area = 330cm²

Total surface area of cylinder = 3432cm²

Step-by-step explanation:

Given:

find the curved surface area and total surface area of a cylinder of radius 21 cm and height of 5 cm

To find:

the curved surface area and total surface area of cylinder.

Solution:

Radius of cylinder (r) = 21cm

Hight of cylinder (h) = 4cm

Now,

Curve surface area = 2πrh

$= > ( \frac{22}{7} ) \times 21 \times 5 \\ = > {330 \: cm}^{2}$

Total surface area = 2πr(h+r)

$= > 2 \times (\frac{22}{7} ) \times 21(5 + 21) \\ = > {3432 \: cm}^{2} \: ans.$

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