Question

50 circular plates, each of radius 7 cm and thickness 1/2 cm, are placed one above other to form a solid right circular cylinder.Find the total surface area and the volume of the cylinder so formed.

Answer 1

there are total 50 cylinders with thickness 1/2 cm
height = 50×1/2 = 25cm
r = 7cm
volume of cylinder =
$\pi {r}^{2} h$
22/7×7×7×25
22×7×25
175×22
3850cm^3

Answer 2

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