pi times 49, or if you round pi to 3.14 it's 153.86
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The diameter of a circle is twice the radius. When the diameter is 7 metres, the radius is 3.5 metres.
Radius of the circle will be 7 inches and its area is pi*7^2 = 154 square inches rounded to a whole number
A cylinder whose radius is 5 and height is 7 has a surface area of 377 units2
Area of a circle = (pi) x (radius)2 (pi) = about 3.1416 or about 22/7 . (It can never be written down exactly.) (radius)2 = (radius) x (radius)
153.94 units2