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Question
If we take 4 rounds around a field that is 160 m long and 90 m wide, what is the distance we walk in kilometers?
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Solution
Perimeter of a rectangular field
= 2 × length + 2 × breadth
= 2 × 160 + 2 × 90
= 320 + 180
= 500 m
In one round, distance walked is 500 m; hence, distance walked in 4 rounds.
= 500 × 4 = 2000 m
= 2 km
∴ The distance walked in 4 rounds is 2 km.
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