Question

Find the area of the curved surface and total surface of the cylinder whose radius of the base 7 cm and height 25 centimetre​

Answer 1

$\huge\green{A}\red{N}\orange{S}\pink{W}{E}\blue{R}$

CSA of a cylinder=2πrh

π=$\frac{22}{7}$

r=7cm

h=25cm

$\huge{=2\times\frac{22}{7}\times7\times25}$

$\huge{=44\times25}$

$\huge{=1,100cm}$

$\huge\blue{\boxed{=1.1m}}$

TSA of a cylinder=2πr(r+h)

$=2\times\frac{22}{7}\times7(7+25)$

$=2\times22\times32$

$=1408cm$

$\huge\boxed{\red{1.408m}}$

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