# The ratio of the curved surface area and the total surface area of a circular cylinder is 1:2 and the total surface area is 616 cm2. Find its volume.

Total surface area of a cylinder =

Curved surface area of a cylinder =

2h=r + h

h=r

Given that total surface area = 616 cm 2

r2 = 7× 7

So, r = h = 7 cm

Volume of a cylinder =

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