Calculate the area of two circles annulus k1 (S, 3 cm) and k2 (S, 5 cm).

Correct result:

S =  50.27 m2


r1=3 cm r2=5 cm S1=π r12=3.1416 3228.2743 cm2 S2=π r22=3.1416 5278.5398 cm2  S=S2S1=78.539828.2743=50.27 m2

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