Velocity.
20 km per hour is approximately equal to 12.4 miles per hour.
20 mph is about 32.2 kph
If you ran at 5 mph for 30 minutes, you'd have covered 2 1/2 miles. At 5 mph, you'll cover 5 miles in one hour. The 30 minutes is half an hour, and half of 5 miles is 2 1/2 miles.
The distance between the two towns is 15 miles. This is determined by multiplying the average speed (45 miles per hour) by the time it takes to drive between the towns (20 minutes converted to hours is 1/3 hour). 45 miles/hour x 1/3 hour = 15 miles.
The average flight speed of a European swallow is around 20 miles per hour.
20 miles per hour north is an example of
Speed.
20 miles per hour
20 km per hour is approximately equal to 12.4 miles per hour.
20 miles per hour
This measure is an example of velocity, which includes both a speed and a direction.
20 knots is about 23.02 miles per hour (knots x 1.150779448 = mph).
If you go 20 miles in 6 minutes, you go 20 miles in 1/10th of an hour. At that rate, you will go 10 times 20 miles in one hour, or 200 miles per hour.
A velocity vector includes both speed and direction.
A sniper can run about 20 miles per hour.
The time it takes to drive 20 miles depends on the speed at which you are driving. If you are driving at a constant speed of 40 miles per hour, it would take you 0.5 hours to drive 20 miles (20 miles / 40 miles per hour = 0.5 hours). If you are driving at a constant speed of 60 miles per hour, it would take you 0.33 hours to drive 20 miles (20 miles / 60 miles per hour = 0.33 hours).
If you go 20 miles in 14 minutes your average speed is 85.71 miles per hour.