Find the length of the diameter of the circle if its circumference is 49.6 dm.

The formula for finding the length of a circle looks like this: L = 2 * pi * r = d * pi. Where pi is a constant number equal to 3.14 (rounded to hundredths), r is the radius of the circle, d is the diameter of the circle. Let us express the diameter from the formula. We get: d = L: pi. We substitute in the formula instead of the length of the circle the decimal fraction of 49.6 decimeters and find the diameter of this circle: d = L: pi = 49.6: 3.14 = 15.8 decimeters.
Answer: the diameter is 15.8 decimeters.

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