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How do you express a rate as a unit rate like 750 yards in 25 minutes?
Geraldshaw
If you divide both terms by 25 then this gives the distance travelled in 1 minute.
750/25 = 30 yards per minute. Or, the distance can be multiplied by 3 (feet in a yard) to measure the speed in feet per minute 30 x 3 = 90 feet per minute. As there are 60 seconds in 1 minute then dividing this figure by 60 gives feet per second : 90/60 = 1.5 fps.
If the yards per minute result is multiplied by 60 (as there are 60 min in 1 hour) then this gives the speed in yards per hour. 30 x 60 = 1800 yd per hour. BUT speed is often quoted as miles per hour. There are 1760 yd in 1 mile so the yards per hour figure of 1800 needs dividing by 1760 to provide the speed in miles per hour.
1800/1760 = 1.023 mph (3dp)
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∙ 14y ago
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