1 hour = 3600 seconds.
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1 min. = 60 sec. 60 min. = 1 hr. 1 hr. = 3600 sec. 24 hr. = 1 day 1 day = 86,400 sec. 7 days = 1 week 1 week = 604,800 sec. 13 weeks = 7,862,400 sec.
45 sec / 1 hr = 45 sec / 3600 sec = 1/80
1 mile/50 sec * 3600 sec/hr = 72 mph
60 mi/hr * 1 hr/60 min * 1 min/60 sec * 5280 ft/mi = 88 ft/sec; so 60 MPH is 88 ft/sec. Multiply 88 ft/sec * 6 sec = 528 ft.
1 mi / 55 MPH = 0.018 hr * 60 min / 1 hr = 1.09 min * 60 sec / 1 min = 1 min 5.5 sec