how long will a girl take to walk round the boundry of square field of area 9 hectares at the rate of 6 km/hr?
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Answer:
Area of the square field
=9 hectares
=90000m²
∴ Side of the square
√90000 =300m
Perimeter 4×300m=1200m
Time= Distance/speed= 1200×60/6000 minutes
=12 minutes
So, it will take 12 minutes.
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