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Question

The circumference of a circle is 123.2 cm. Taking π=227, calculate the area of the circle in cm2, correct to the nearest cm2 is

A
196cm2
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B
1207cm2
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C
2414cm2
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D
2207cm2
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Solution

The correct option is B 1207cm2
GiventhecircumferenceCofacircle=r=123.2cm.Tofindouttheareaofthecircle=?

SolutionThecircumferenceCofthecircle=2πr

r=C2π=123.22×227cm=123.2×72×22cm=19.6cm.Nowar.circle=πr2=227×19.62cm2=1207cm2.AnsOptionB.

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