None.
2.5 seconds is a period of time. It is not a speed since there is no measure of distance involved. By contrast, yards per minte is a measure of speed. The two measures are incompatible.
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1 yard = 36 inches 1 minute = 60 seconds ∴ 32 yards per minute = 32( 36 inches ) per ( 60 seconds ) = 1152 inches per 60 seconds = 19.2 inches per second
60 miles per hour = 1,760 yards per minute (often referred to as "one mile")
30 yards per second, or 90 feet per second.
I multiply it by 36 as there are 36 inches in each yard to get inches per minute and divide by 60 as there are 60 seconds in each minute to get inches per second.
300 seconds / 5 minutes = 300/5 = 60 seconds per minute.