Divide 1.5 miles by 45 minutes to get speed in miles per minute. Multiply by 5280 ft/mile to get feet per minute, then multiply by 60 minutes/hour to get to feet per hour. 1.5miles/45 minutes X 5280 feet/mile X 60 minutes/hour = 10,560 feet/hour
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That's a rate of 30 miles per hour. A minute is 60 seconds. An hour is 60 minutes or 60*60=3600 seconds. The distance traveled in 1 hour is 44*3600 or 158400 feet. A mile is 5280 feet. Therefore the distance traveled in miles is 158400/5280 or 30 miles.
There are 5280 feet in one mile. Therefore, 169 miles is equal to 169 x 5280 = 892320 feet. There are (3 x 60) + 30 = 210 minutes in three and a half hours. Therefore, you would be travelling at 892320 / 210 = 4249 and one seventh (that is, 4249.142857 recurring) feet per minute.
87 miles per hour = 1,531.2 feet per 12 seconds
At 55 mph you are traveling 80.66 feet per second and after one hour at that speed you will have traveled 290,400 feet.
270 feet in 10.8 minutes equals 0.284 miles per hour.