Quarter of a circle

Calculate the circumference of a quarter circle if its area is S = 314 cm2.

Correct answer:

o =  71.3978 cm

Step-by-step explanation:

S=314 cm2 S = 4 π   r 2  r=4 S/π=4 314/3.141619.9949 cm  o=2 r+2π r/4=2 19.9949+2 3.1416 19.9949/4=71.3978 cm

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