Question

a person walks at the rate of 4km/h . How long will he take to go round a square park 5times, whose area is 2500m²?

Answer 1

He will take time 250/4hrs that is 62.5 hrs

Answer 2

Speed =4km/hr
Area=2500m square
we have to convert km/hr into m/s
4*1000/3600
=10/9
Time =distance /speed
=5*2500
=12500
$12500 \div 10 \div 9 \\12500 \times9 \div 10 \\ 1250 \times 9 \\ 11250sec$ 11250/60=1875hrs