How many seconds to run 100 yards at 8 mph?



But we must convert 8 miles per hour to yards per second



To get from miles to yards we go from miles to feet to yards.

To get from hours to seconds, we go from hours to minutes to seconds.

To go from miles to feet we multiply by 

so the mile in the bottom will cancel with the mile in the top:



To go from hours to minutes we multiply by 

so the hour in the top will cancel with the hour in the bottom:



To go from feet to yards we multiply by 

so the feet in the bottom will cancel with the feet in the top



To go from minutes to seconds we multiply by 

so the minutes in the top will cancel with the minutes in the nottom.



We cancel the unit MILE



We cancel the unit HOUR



We cancel the unit FEET



We cancel the unit MINUTE

















Cancel the YARDs






25.568 SECONDS

Edwin