Circumference of A Circle: To calculate the circumference of a circle, use the formula
If you have the radius instead of the diameter, multiply it by 2 to get the diameter. You can also use the formula for circumference of a circle using radius, which is .
Example: Find the circumference of the circle with a diameter of 8 inches.
Solution: C = 3.14 X 8 = 25.163 inch.
Example: Find the circumference of the circle with a radius of 7cm.
Solution: C =
If the ratio of areas of two circles is 16:25, the ratio of their circumference is: | |||
Right Option : C | |||
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A circular road runs round a circular ground. If the difference between the circumference of the outer circle and the inner circle is 66 meter, then the width of the road is ______________ : | |||
Right Option : B | |||
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If the perimeter of a circle is cm , then. Find its radius . | |||
Right Option : A | |||
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It was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.