I think the fastest swimming technique is using your hands and your feet at the same time so the movement of your body helps you go faster through the water.
Walls are able too resist water because the walls are water proof!
to not do it
It is roughly 160ft for water resistance.
Drink water
Fail to resist
because it is a 50m pool, so one lap is 50m. that's why everything is a 200, 400, nothing has a 50 in it
1km = 1000m 1km > 50m 1km is bigger
Hkjh
Wax is a traditional resist for water based fabric dyes.
It's 50m x 50m
100m x 50m=5000m2