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ICSE Class 7 Answered

A circular racing track has imner circumference 528m and outer circumference 616m.find the width of the track
Asked by ritikaprasad026 | 21 Sep, 2020, 05:52: PM
answered-by-expert Expert Answer

Circumference of big circle = 616 m

2πr = 616

r = 616 × 7/22 = 14 × 7 = 98 m

Circumference of small circle = 528 m

2πr = 528

πr = 528 × 7/22 = 12 × 7 = 84

width of the track

= Radius of big circle - radius of small circle

= 98 - 84 = 14 m

Answered by Renu Varma | 22 Sep, 2020, 12:14: PM

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