Question

circumference of the base of a cylinder is 13.2 cm and height is 18 metre find its curved surface area and total surface area​

Answer 1

Answer:

C.S.A of cylinder= 2rh

Height of the cylinder= 20m

circumference of the cylinder=2r

C.S.A= circumference*height

        = 13.2*20

        =264cm sq.

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Step-by-step explanation:

Answer 2

Answer:

CSA =

Step-by-step explanation:

Circumference of the circle = 2 pie r

i.e, 2 * 22/7 * r = 13.2

-> r = 2.1 cm

Also h = 18m = 1800 cm

Now,

CSA = 2pierh

= 2* 22/7 * 2.1 * 1800

= 23760 cm^2

TSA = pie r^2 h

= 22/7 * (2.1)^2 * 1800

= 22/7 * 4.41 * 1800

= 24948 cm^2

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Hope this helps you :D