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Which of the following has the fastest unit rate A 30 miles per hour B 40 feet per second C 700 yards per minute D 2200 ft per minute?
Wiki User
∙ 9y ago
Verified answer
A is the fastest unit rate.
Change everything to the same units, e.g. feet per minute, so that you can compare them:
A. 30 mi/hr * (5280 ft/1 mi) * (1 hr/60 min) = 30*5280/60 ft/min = 2640 ft/min. [notice that (5280 ft/1 mi) and (1 hr/60 min) are both fractions equal to 1. This is the key to unit conversions.]
B. 40 feet/sec * (60 sec/1 minute) = 40*60 ft/min = 2400 ft/min.
C. 700 yards/min * (3 ft/1 yd) - 700*3 ft/min = 2100 ft/min.
D. 2200 ft/min.
Wiki User
∙ 9y ago
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If you divide a speed in miles per minute by 60 you get the same speed expressed in miles per .?
second
If you divide a speed in miles per minute by 60 you get the same speed expressed in miles per?
second
