The length of one circle is 28 cm, and the length of the other is 49 cm.

| January 16, 2021 | education

The length of one circle is 28 cm, and the length of the other is 49 cm. Find the ratio of the radius of the first circle to the radius of the second circle.

1. It is known that the length of a circle is equal to twice the product of the number P by the radius of this circle.

2. Find the radius of the first circle R1 if the length of the circle P1 is 28 centimeters.

P1 = 2 * 3.14 * R1 = 28 centimeters.

R1 = 28: 2: 3.14 = 4.46 centimeters.

3. Determine the radius of the second circle R2 if the length of the second circle P2 is 49 centimeters.

P2 = 2 * 3.14 * R2 = 49 centimeters.

R2 = 49: 2: 3.14 = 7.8 centimeters.

4. Let’s calculate the ratio of the radius of the first circle to the radius of the second circle.

4.46 cm: 7.8 cm = 0.57.

Answer: The ratio of the radius of the first circle to the radius of the second circle is 0.57.



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