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Question

Figure depicts a racing track whose left and right ends are semi-circular. The distance between the two inner parallel line segments is 60 m and they are each 106 m long. If the track is 10 m wide, find the distance around the track around the inner edge.

i


  1. 301

  2. 400

  3. 310

  4. 320


Solution

The correct option is B

400


The required distance is sum of long sides of rectangle and the circumference of semi-circles.

106 + 106 + 2π(30) =400 m

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