6. A rectangular field is 72 m by 58 m. Amar walks round it at the rate of 3 km per hour. What time will he take in taking 2 rounds.
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Answer:
I think you show find area of rectangle
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Answer: Dimension of rectangular field =72cm by 58
Perimeter of rectangular field =2(l+b)
=2×(72+58)
=2×130=260m
The distance took by Amar in taking two rounds =2×260m =520m
Speed of Amar=3 km/hr
=
3×1000 by 3000 m/sec = 5 by 6 m/s
Total times taken = Distance by Speed
Ans = 10.4 min.
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