Question

If the diameter of a cylinder is 20 cm and its height is 2 metres then total surface area is

Answer 1

heya mate !!

here's your answer :-
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Given that ,

● The diameter of a cylinder = 20 cm

=> We know that radius = diameter / 2

======> So , radius = 10 / 2

======> 10 cm

● height of the cylinder = 2m

=> We know that 1m = 1000 cm

======> So , height = 1000 * 2

======> 2000 cm.
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● Total surface area of cylinder = 2 π r ( h + r )

On putting the values on formula , we get :-

==> 2 * 22 / 7 * 10 ( 200 + 10 ) cm

==> 2 * 22 / 7 * 10 ( 210 ) cm

==> 2 * 22 / 7 * 2100 cm

==> 2 * 22 * 300 cm

==> 44 * 300 cm

==> 13200 cm

or

==> 13.2 m.

Hence , the total surface area of cylinder is = 13.2 m.

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hope it helps !!

thanks for asking :)

☆ be brainly ☆