Let’s write down the formula by which the area of the circle is calculated:
S = пr ^ 2, where
n – constant, which is taken equal to 3.14;
r is the radius of the circle (known by the specification).
1. Substituting numerical values into the above formula, we find the area of a circle for the first option, the radius is 14 dm:
S = 3.14 * 14 ^ 2 = 3.14 * 196 = 615.44 (dm2).
2. Substituting numerical values into the formula, we find the area of a circle for the second option, the radius is 3.6 m:
S = 3.14 * 3.62 = 3.14 * 12.96 = 40.6944 (dm2).
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