so miles per hour
miles/hour
90/1
1 hour=60 miutes
1 minute=60 seconds
1 hour=60 times 60 seconds=3600 seconds
1 miles=5280 feet
90 miles=5280 feet times 90=475200 feet
90 mile per hour=475200ft/3600sec=4752/36=132feet per second
132>121
robbins thowrs faster