Question

diameter of base of cylinder is 42cm and height 10cm find c.s.a​

Answer 1

Answer:

Diameter of cylinder= 42cm

radius of cylinder= 42/2=21cm

height of the cylinder=10cm

Now,we have to find out c.s.a of cylinder,

C.S.A of cylinder = 2πrh

=2X 22/7 X 21 X 10

= 1,320cm

Step-by-step explanation:

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Answer 2

Answer ⤵️

Diameter of the cylinder= 42 cm

Radius of the cylinder= 42/2=21 cm

C.S.A of the cylinder= 2πrh

$2 \times \frac{22}{7} \times 21 \times 10 \\ = \frac{11}{7} \times 21 \times 10 \\ = 11 \times 3 \times 10 \\ = 330 \: \: {cm}^{2}$

So its C.S.A is 330 cm²

Step-by-step explanation:

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