The perimeter of an ellipse is given by:
P = (2 * pi) * root ((a ^ 2 + b ^ 2) / 2)
Where,
a: semi-major axis
b: Semi-minor axis
Substituting the values we have:
P = (2 * 3.14) * root (((30/2) ^ 2 + (12/2) ^ 2) / 2)
P = 71.74058266
Round off to the nearest whole number
P = 72 mm
Answer:
B.72 mm
