Average speed is about 6 mph.
17 MPH
An average of 4.29 mph.
approximately 17 mph average
11 mph
A Hippo can run from 18 mph / 30 khm; to 30 mph / 50 khm and the "Average Human" can run between 14 and 27 mph (Olympic sprinters ignored for the purposes of this question) - so the answer would be that a Hippo can, on average, outrun a human.
Yes, because a good walk is about 5 mph.
3.5 mph
No; a grizzly bear can run about 30 MPH. A horse can run about 40 MPH. Horse speed can vary by breed, however.
You need to run at an average speed of 15 mph.
40 mph
Tigers can run up to 35 mph.