Each lane has a line on the bottom that the swimmer can use to help swim straight. The line ends in a "T" near both ends, indicating that they are getting close to the wall/end of pool.
The "T" at each end of the lane in a competetive pool is to warn the swimmer of the aproach of the turn.
An Olympic sized pool is 50m
Neither. Say, "25 metre pool".
the 1st olympic swimming pool was in 1899.
A semi-olympic pool is 25 meters long by 12.5 meters wide with a depth of between 1.2 and 1.6 meters.
The temperature of an olympic pool is kept at 25-28C (77-82F)
One is bigger than the other
50 Meters, standard Olympic Sized pool.
There are usually 50 meters in a Olympic sized swimming pool.
164.041995 feet
Still used as an Olympic pool for practice and events.
In the London 2012 Olympic Games the pool is 50 m length.