Question

Find the area of curved surface and total surface area
of the cylinders whose heights and radii are given
below :
(ICSE)
(1) h= 12 cm, r = 7 cm
(ii) h= 10 cm, r= 7 cm
(iii) h= 5 cm, r = 21 cm
(iv) h= 20 cm, r= 14 cm
(v) h = 16 m, r= 10.5 m
plzz​

Answer 1

Hi mate

Here is ur answer

h=12cm,r=7cm

curved surface area of a cylinder = 2pierh

= 2pierh

= 2*22/7*7*12

= 528cm2

Total Surface area of a cylinder = 2pier(r+h)

= 2pier(r+h)

=2*22/7*7 (7+12)

=836cm2

Hope it is helpful.

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Answer 2

Anwer

CSA = 2πrh

TSA = 2πr ( r + h )

1) CSA = 2 * 22/7 * 7 * 12

= 44 * 12

= 528.

pls follow similar steps for other questions too with formula

TSA = 836

2) CSA = 440

TSA = 748

3) CSA = 660

TSA = 3432

4) CSA = 1760

TSA = 2992

5) CSA = 1056

TSA = 1749

Hope this was helpfulpls

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thank u