250 m 250 Kilometer (KM) which is 25000 meter(m) since 25m (30Yards) not that long but 25000m could be width of a state.
250 dekameters
water polo, 100 meter swim, 400 meter team swim. these are also olympic events.
250 millimeters is equal to 0.25 meters. This conversion is done by dividing the number of millimeters by 1000, since there are 1000 millimeters in a meter.
You may be able to float but not swim - 1000 liters occupies 1 cubic meter - or a box 1 meter x 1 meter by 1 meter - not enough room to move around
250 miles = 402,336 meters.
250 micrometres = 0.00025 metres.
to swim 800 meters in a 25 meter poll, you must swim 32 lengths, but to swim 800 YARDS, you only have to swim 29.26 lengths (so you should just swim 30 lenghts)
If you are a good swimmer it should take you less than 3 minutes in a 25 meter pool
2500000
The best way to get ready for a 500-meter swim is to practice swimming. You also want to exercise regularly to keep in good shape.
I've never seen a 20 meter pool. just 25's and 50's. But, in a 20 it would be 250, in a 25 it is 200, and in a 50 it is 100.