i was wondering what 840 feet per seconds equals in miles per hour
2006-12-08 01:19:34 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
(840 feets / 1 second)*(1 mile / 5280 feets)*(60 seconds / 1 minute)*(60 minutes / 1 hour) = approximately 572.7 miles per hour
2006-12-08 01:30:13 · answer #1 · answered by Cinna B 2 · 0⤊ 0⤋
840 feet per second equals in miles per hour
1 foot per second = 0.6818181818 miles per hour
Multiply 0.6818181818 times 840
0.6818181818 x 840 = 572.727272 miles per hour
572.73 mph rounded to two decimal places
The answer is 572, 73 miles per hour
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2006-12-08 10:54:14 · answer #2 · answered by SAMUEL D 7 · 0⤊ 0⤋
How many seconds are in an hour? You can work out 840 ft/s as a number of feet per hour.
How many feet in a mile? You can then convert feet per hour to miles per hour...
2006-12-08 09:25:23 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Factor label method:
(840 feet/ sec) X (mile/5280 feet) X (60 seconds/minute) X (60 minutes/hour) = 572.727.... miles/ hour
It's easier when you write it out as fractions. Just cancel the units and what is left is miles/hour.
2006-12-08 09:31:27 · answer #4 · answered by Jack 2 · 0⤊ 0⤋
5 280 ft = 1 mile
3 600 s = 1 h
840 ft / s = (840 ft/s)(3600s / 1h)(1 mile/ 5280 ft) = 572. 7272...mi/h
2006-12-08 09:26:40 · answer #5 · answered by Joe Mkt 3 · 0⤊ 0⤋
1 foot per sec=0.6818182 mph
840 foot /sec=0.6818182*840
=572.73 mph
2006-12-08 09:23:00 · answer #6 · answered by raj 7 · 1⤊ 0⤋