140/2¾ = 140 x 4/11 = 50.91 mph
4 miles in 18 minutes = 13.33... miles per hour.
20 miles per hour.
300 miles per hour.
There are 60 seconds per minute and 60 minutes per hour; therefore, there are 60 X 60 = 3600 seconds per hour. The stated rate is 1/45 mile per second. 1/45 X 3600 = 80 miles per hour.
Rate is units divided by time. For instance, speed is a rate. If you're driving, moving at 100 miles per hour (100 miles / hour ) then 100 mph is your rate of speed.
Distance = Rate divided by time Rate = 120miles per hour Time = 10minutes = 10 minutes x 1 hour/60 minutes = 0.167 hour Distance = 120mph/0.167 hour = 718.56 miles Answer: For the rate of 120 mph, you'll go to 718.56 miles in 10 minutes.
It will take you 11 minutes because at 60/mph you're driving at the rate of 1 mile per minute. (60 miles in 1 hour = 60 miles in 60 minutes.)
100 miles per hour
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.
Based on the formula: rate x time=distance So, we have: rate x .35hours (which is 21 minutes) = 2.43 miles then, rate = 2.43/.35, which equals 6.943 miles per hour.
6 mph, six miles per hour.
17.72 mph at that rate of travel.