The given figure shows a running track. A boy runs along its edges. Find the distance covered by the boy in one round.
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The track consists of a rectangle and two semi-circles.
Let's take the two semi-circles as one circle.
∴The total distance covered = Perimeter of the track
= Length of rectangle + Perimeter of one circle.
Perimeter of the circle = 2πr
= 2 × 22 × 21
----- ------ (∵ 21 isn't the radius)
7 2
= 22 × 3
= 66m
∴ Distance covered in 1 round = 60 + 60 + 66
= 186m.
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