Average speed is total distance covered divided by total time taken to cover the distance.5 miles in 0.2 hours is 5/0.2 is 50/2 is 25 mph. That's the calculation.But, I don't really understand the question. OK so it went 5 miles, and then found a hapless zebra. Could a lion see a zebra from 5 miles out ? Very good eyesight ??? I don't know how a lion stalks a zebra, 'cos I've never seen it happen.