find the diameter of a circle whose circumference is 31.4 CM
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find the diameter of a circle whose circumference is 31.4 CM
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Answer:
Solution:
Circumference of the circle = 31.4 cm
2πr = 31.4 cm
2 × 3.14 × r = 31.4 cm
r = 31.4 cm /6.28
r = 5 cm
Area of the circle = πr2
= 3.14 × 5 cm × 5 cm
= 78.5 cm2
Therefore, the radius and the area of the circle are 5 cm and 78.5 cm2 respectively.
Verified answer
Answer:
10 cm
Step-by-step explanation:
The circumference of the circle = 31.4 cm
We know that, circumference of a circle = 2πr
= 2piR = 31.4
= 2 x 3.14 x r = 31.4
= r = 31.4/2x3.14 = 5 cm
Diameter = 5x2
Diameter = 10 cm