238.64 mph. See this site.
http://www.calculateme.com/Speed/index.htm
135 feet per second is 92.05 miles per hour.
132 fps
168 mph = 246.4 fps
80 fps = 54.55 mph (rounded)
12 fps = 82/11 mph
1 mile = 5280 feet 1 hour = 3600 seconds So 60 miles per hour = 60*5280/3600 fps = 88 fps
It doesn't work out exactly, but it's about 26 fps.
280 feet per second is 190.91 miles per hour.
Comparing size or distance with speed here. Perhaps you are looking for 45x5280 ft per hour. Or perhaps you are asking how many feet per second at 45 miles per hour = 66 fps.
760 mph = 1114.667 fps hope this helps K
By fps I assume it feet per second,hence 400fps=272.72727288 mph
350 or lower