Was wondering about timing for others to swim this distance -- I swim around 5K per day, probably 5 or so days per week on average -- approx. time is around 1 hr 30 mins or 1 hr 45 mins, nonstop swimming. Note that I've just gotten back into swimming this summer after a break of 2 yrs or so, but when younger I swam daily during summers.
Late 30s male in pretty decent shape, 6' + and a little over 200 lbs.
Their average speed is the same, 5km/hour. Velocity takes both speed and direction into account. Hence Mia's average velocity was 5km/hour North, and Luisa's was 5km/hour South. Assuming they were in the same general region on Earth, this means their average velocities wee in opposite directions, but equal in magnitude.
Average speed=distance/time=7.5 km/1.5hr=5km/hr
Your average speed is 5km per hour.
Sub 20 for a Man and sub 25mins for a girl is a good time.
According to Google @ http://www.google.com/search?q=5km+to+miles 5km is equal to 3.10685596 miles.
5km is about 3 miles.
5km = 5000m = 500 000cm, so 1cm goes into 5km 500 000 times
At an average of 10 km per hour.
You have to average at least 9.32 miles per hour over the distance of the race to achieve a 20-minute time.
around 30mn is really good but I started around 45mn.
25 square kms
600km is 120 times greater than 5km.