Question

Circumference of the base of a cylinder is 13.2m and it's hight is 20 find the curved surface area and surface area

Answer 1

Hey !!

Here is your answer...
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circumference of base = 13.2 m
2πr = 13.2
2 × 22/7 × r = 13.2
r = 13.2 × 7 / 44
r = 92.4/44
r = 2.1 m

h = 20 m

C.S.A of cylinder = 2πrh
= (2πr) × h
= 13.2 × 20
= 265 m^2

T.S.A of cylinder = 2πr ( h + r )
= 13.2 ( 20 + 2.1 )
= 13.2 ( 22.1 )
= 291.72 m^2
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Hope it helps you...

Thanks..
:))

Answer 2

C.S.A of cylinder= 2$\pi$rh
Height of the cylinder= 20m
circumference of the cylinder=2$\pi$r

C.S.A= circumference*height
         = 13.2*20
         =264cm sq.

Hope it helps....