Sum

Pinky runs around a square field of side 75 m, Bob runs around a rectangular field with length 160 m and breadth105 m. Who covers more distance and by how much?

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#### Solution

Distance covered by Pinky in one round = Perimeter of the square

= 4 × length of a side

= 4 × 75 m

= 300 m

Distance covered by Bob in one round = Perimeter of the rectangle

= 2 × (length + breadth)

= 2 × (160 m + 105 m)

= 2 × 265 m

= 530 m

Difference in the distance covered = 530 m – 300 m = 230m.

Therefore, Bob covers more distance by 230 m.

Concept: Perimeter of Polygon

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