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2014-07-27T17:10:59+05:30

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A = 180 m
Perimeter = 4 a = 720 m
Distance covered = 8 * perimeter = 5760 m    = 5760 / 1000  km = 5.76 km

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2014-07-27T17:11:40+05:30
180m = 180÷1000km = 0.18km
so, perimeter of field = 4 × 0.18 = 0.72km
he walked 8 times,
⇒0.72×8 = 5.76km
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