the area of a circle is 38.5 sq m. find its circumference (in cm).
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Step-by-step explanation:
the area of a circle is 38.5 sq m. find its circumference (in cm).
Formula used
- 2πr Circumference
- πr² Area
Need to find
- radius
- Circumference
Solution.
πr² Area
38.5 = 22/7 × r²
38.5 × 7/22 = r²
12.25 = r²
3.5 = r
Circumference of Circle
2πr Circumference
2 × 22/7 × 3.5
44 × 3.5 / 7
154 / 7
22
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Answer:
22 cm
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