Radius of the circle

Calculate the radius of the circle whose length is 107 cm larger than its diameter

Correct result:

r =  24.981 cm

Solution:

2π⋅ r=107+D 2π⋅ r=107+2⋅ r  r=107/(2π−2)=107/(2⋅ 3.1416−2)=24.981 cm

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