Question

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Find the area of curved surface if area of base of cylindrical tank is 178cm² and height is 30cm.

Answer : 5280 m²​

Answer 1

area of base of cylinder=2πr

178=2πr

r=(89/π)

CSA of cylinder=2πrh

$= 2 \times \pi \times 89 \div \pi \times 30$

after this step

π will be cancelled

$= 2 \times 89 \times 30 \\ = 5340$

therefore the CSA of the cylinder is 5340cm^2

hope it helps u