the radius of the inner and Outer circumference of a circular running track a 63 M and 70 M respectively find the area of the track also find the difference between the length of the two circumference of the track
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Area of path
= Area of big circle - small circle
Big circle
Area = πr^2
= 22/7 x 70 x 70
= 15400 m^2
Small Circle
Area = πr^2
= 22/7 x 63 x 63
= 12474 m^2
Area of path = 15400 - 12474
= 2926 m^2
Circumference of big Circle
= 2πr
= 2 x 22/7 x 70
= 440 m
Circumference of small Circle
= 2πr
= 2 x 22/7 x 63
= 396 m
Difference in their lengths
= 440 - 396
= 44m
= Area of big circle - small circle
Big circle
Area = πr^2
= 22/7 x 70 x 70
= 15400 m^2
Small Circle
Area = πr^2
= 22/7 x 63 x 63
= 12474 m^2
Area of path = 15400 - 12474
= 2926 m^2
Circumference of big Circle
= 2πr
= 2 x 22/7 x 70
= 440 m
Circumference of small Circle
= 2πr
= 2 x 22/7 x 63
= 396 m
Difference in their lengths
= 440 - 396
= 44m
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