Question

A person walks at 4km/h. How long will he take to go round a square field four times,the area of which being 900 sq. metres. The answer is 7.2 minutes. ​

Answer 1

Step-by-step explanation:

Area of square=side2side2=2500side=50 m .Perimeter of Square=4×side=4×50=200 m .Distance to be covered in 5 rounds=5×200=1000 m .=1 km .We know ,Time=DistanceSpeed=14 hours=14×60=15 minutes .He will take 15 minutes to go round a square park 5 times .

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Answer 2

Answer:

15min.

Step-by-step explanation:

Area of square= side 2 side2=2500side=50 m .Perimeter of Square=4×side=4×50=200 m .Distance to be covered in 5 rounds=5×200=1000 m .=1 km .We know ,Time=Distance Speed=14 hours=14×60=15 minutes .He will take 15 minutes to go round a square park 5 times .