Question

the diameter of a closed till enter is 21 cm and the height is 10 centimetre find the total surface area of the cylinder​

solution :-
diameter= 21 CM
radius = 21/2
height =10 cm

total surface area of a cylinder=2πr (r+h)
= 2x22/7x21/2(21+10/2)
=66x(21+20/2)
=33x41= 1353 cm^



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Answer 1

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