Question

the radius and height of a cyllinder are ratio 5:7 and is volume of 550cm³ curved surface area ​

Answer 1

Let the ratio be 5x and 7x

Volume of cylinder = 550cm^3=πr^2h

Put the values..

550 =22/7×25x^2×7x

550 =22×25x^3

On solving this we will get x=1

Therefore, radius is 5cm and height is 7cm.

CSA= 2πrh

=2× 22/7×5×7

=220cm^2

Hence, curved surface area of cylinder is 220 cm.cm

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