Area of circle of radius 3cm is 3 x 3 x pi ie 9pi sqcm, approx 28.26cm2
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The volume of a cylinder that has a radius of 3cm and a height of 7cm is 197.92cm3
A cylinder with a 7cm radius and 3cm height has a total surface area of about 439.82cm2
(3cm)2 x pi = 28.274 cm2
A cylinder with a radius of 7 centimeter and a height of 12 centimeter has a volume of 1,847.26 cm3.
radius=1/2 diameter so R=3cm