the circumference of a coin is 7.42 cm. What is the area? using 3.14 for π

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16-07-2018
Mathematics

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the circumference of a coin is 7.42 cm. What is the area? using 3.14 for π

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Abhishek55 Abhishek55 · Answer 1 · 2018-07-16T05:43:18+02:00

By the question,
π = 3.14
circumference = 7.42 cm
or,. 2πr. =7.42
or,. 2×3.14×r. =7.42
or,. 6.28r. =7.42
or,. r. =7.42÷6.28
∆. r. =1.18 cm
Again,
Area of circumference= πr^2
=3.14 × 1.18^2
=3.14 × 1.39
=4.37 cm^2