What is the circumference (in cm2) of a circle for which the ratio of the area and the circumference is 7 : 4? [Take π = 22/7]
Explanation:
Ratio of area and circumference of a circle = πr2 : 2πr = r : 2
∴ 7/4 = r/2
∴ r = 7/2 cm
∴ Circumference of the circle = 2πr = 2 × 22/7 × 7/2 = 22 cm.
Hence, option (b).
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