2007-01-07 14:48:34 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Because a mile is 5280 feet and an hour is 3600 seconds.
2007-01-07 14:59:40 · answer #1 · answered by amateur_mathemagician 2 · 0⤊ 0⤋
[30 miles/hour *5280 feet/mile]/3600 seconds per/hour
= 44 feet per second
Notice that miles/hour * feet/mile *hour/second give you feet/second because the miles cancel out and hours cancel out. This is called a dimensional analysis to make sure you have your units set up properly.
2007-01-07 23:00:56 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋
1 mile = 5280 feet
30 miles per hour = 158,400 feet per hour = 2640 feet per minute = 44 feet per second
2007-01-07 23:24:55 · answer #3 · answered by Sammy 2 · 0⤊ 0⤋
5280 *30 /60/60=44ft per sec
2007-01-07 22:58:04 · answer #4 · answered by al b 5 · 0⤊ 1⤋
30 miles/hour = (30 miles/hour) * (1/3600 hour/sec) * (5280 feet/mile) = (30*5280/3600) feet/sec = 44 feet/sec
2007-01-07 22:55:34 · answer #5 · answered by Anonymous · 0⤊ 1⤋
30 mph * hour/3600 sec * 5280 ft/mile = 44 ft/sec
2007-01-07 22:52:50 · answer #6 · answered by gebobs 6 · 0⤊ 1⤋