Roger Bannister, a British man, in 1954. I remember it well.
Rodger bannister
From England and the the first to run the mile in under four minutes
John Walker was the first man to run one mile under four minutes. He ran one mile in 3:50 (3 minutes, 50 seconds).
Was first to run a mile in under four minutes
Roger Bannister
On May 6, 1954 Roger Bannister became the first person to run a mile in under four minutes. Bannister's time was three minutes and 59.4 seconds.
Practice and training. The record for a mile is less than 4 minutes, so half a mile should be easy.
The first ever sub-four minute mile was run by Roger Bannister on May 6th, 1954.
9.154 minutes per mile (rounded)
The Perfect Mile is a book by Neal Bascomb, and a movie. The subject matter is about three men who all wanted to be the first to run the "four-minute mile" in the mid-1950's; Roger Bannister, John Landy and Wes Santee. All succeeded in running a mile in under four minutes, but Roger Bannister, from England, was the first.
There are 60 minutes per hour so speed is 1 mile divided by four minutes or 1/4 mile per minute. The multiply by 60 minutes per hour Speed = 1/4 x 60 = 15 mph
There are 5280 feet in one mile. Assuming a constant speed throughout the entire four minutes, they would run 5280/240 = 22 feet per second.