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प्रश्न
The radius of two circles are 20 cm and 13 cm. Find the difference between their circumferences. (Take π =`22/7`)
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उत्तर
Radius of 1st circle = 20 cm
Circumference of the circle = 2πr
= `2xx22/7xx20`
= `40 xx 22/7`
= 125.7 cm
The radius of 2nd circle = 13 cm
Circumference of the circle = 2πr
= `2xx22/7xx13`
= `26 xx 22/7`
= 81.7
∴ The difference of circumference of two circles
= 125.7 − 81.7 cm = 44 cm
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