find the area and circumference of the circle whose radius is 3.5 centimetre
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area=77cm
circumference=22cm
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given, the diameter of the circle = 3.5 = 7/2 cm
radius of circle = 1/2 ×7/2 = 7/4
circumference = 2πr = 2×22/7×7/4 = 11cm
area of circle = πr2
= 22/7 × 7/4 × 7/4 = 77/8 cm = 9.625cm
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