Ans: 8 hours and 90 minutes
The length of Football field = 300ft by 160 ft.
On converting it into meter, we get length of field = 91.44 m
and the width of field = 48.8 m
Now, distance = Area moved/ width = (91.44*48.8) / 0.5 = 8924.55 m = 8.9245 km
Ans, Time taken = distance*speed = 8.9245*1 km/hr = 8 hours and 90 minutes