This means that the battery is discharged down to 10.5 volts over a 20 hour period while the total actual amp-hours that it supplies are measured. Sometimes ratings at the 6 hour rate and 100 hour rate are also given for comparison and for different applications.
Pool meets are usually no more than 4 hours, but beach meets last about 7 hours. It depends how many events are in the meet. And then if it is a really big meet (like a tournament kind of) it can last days. Hope that helps.
Best Answer: I messure things in mts but as a mile is equal to 1.6km aprox. A pro swimmer has times in the 1500mt trial of 15 min aprox. A good swimmer does it in about 20 min. Someone that trains constantly but does not want to compete would be between 25 and 30 mins. Everybody that swims 1500 mt (close to a mile) under 35min should be considered a fit person and a good swimmer.