I believe George Sheehan ran a mile in 4 minutes and 47 seconds in 1968.
30-33 sec
The mile and a half run is extremely rarely, if ever contested by elite runners. However based on current world records for the mile and two mile, we can infer that the world record if it were commonly contested would probably be about 5:50.
A world class runner -male would definitely always want to go under 3:50.
4 minutes and 50 seconds
11.2
About 31/50 of a mile (0.62 mile).
Depending on fitness, 11 to 15 minutes.
yes
how many acres in a mile 50 feet wide?
One mile equals 35.2 50-yard dashes.
40-50 years old depending on the enviroment, but their has been a record of up to 103 years old.
most likely not