Question

a man runs around the square park of side 15m how many round should he take in order of cover 420m

Answer 1

perimeter of square=4a
=4×15
=60m

So he should take =420m/60m rounds
=7 rounds.

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so he should take 7 rounds to cover 420m.
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I hope it helps you.

Answer 2

perimeter of square is 4*side
15*4=60m
so he should take 420m/60m=7 rounds
answer is 7rounds
I hope this answer is right