From the 15 yard line to the 50 yard line (the center) is 35 yards. It's another 10 yards to the other team's 40 yard line. So the total distance from one team's 15 yard line to the other team's 40 yard line is 45 yards.
50 yards
45 yards ??
That's 40 yards
4 yps
40 yards
40 yards...
one hundredth of a football field from touchdown line to touchdown line. A yard stick is a yard long.
About 30 yards.
40 yards
45 yards (or 135 feet).
In order for a team to reach the red zone they must pass the opposing teams 20 yard line.
Usually when a team is close enough to try, which is usually inside the other teams forty yard line, and when the idea of scoring a TD is not plausible.