8
It is not always, many events are relays with four swimmers. But most events for swimming are individual, as swimming is often described as a personal race against the clock.
1200.
This answer depends on the competitive level of the athelete at hand. Anywhere between 10-30 hrs for competitive swimmers
1,200 swimmers
8.
loads of swimmers in geremanygo swimming more than England loads of swimmers in geremanygo swimming more than England
320
1200
There are usually 50 meters in a Olympic sized swimming pool.
Many swimmers (in a pool) wear swimming goggles.
13
8