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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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
=
3000
3×1000
m/sec =
6
5
m/s
Total times taken =
Speed
Distance
=
6
5
520
=520×
5
6
=104×
60
6
min =10.4min.
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