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A race track is in the form of a ring whose inner and outer circumference are 437 m and 503 m respectively. Find the area of the track.
  • a)
    4935 m2
  • b)
    4065 m2
  • c)
    4135 m2
  • d)
    None of these
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
A race track is in the form of a ring whose inner and outer circumfere...
Let R be the radius of outer circle and r be the radius of inner circle
2πR = 503

and 2πr = 437

Width of the track = R - r = 
Area of the track = π(R2 - r2)
= π(R + r) (R - r)

= 4935 m2
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