Circumference 1.2 m. What is the length of the other circle, whose diameter is 2 times the diameter of the first circle?
The diameter and circumference of the small circle will be denoted by d and l, the large – D and L, respectively:
d = l / pi;
d = 1.2 / pi.
The diameter of the great circle is 2 times larger:
D = 2 x d;
D = 2 x 1.2 / pi;
D = 2.4 / pi.
The circumference of the great circle will be:
L = D x pi;
L = pi x 2.4 / pi;
L = 2.4 (m).
Answer: The circumference of a circle 2 times the diameter is 2.4 meters.
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