John ran a mile in 6 minutes 15 seconds. If Joe ran at an average speed of 168 inches per second, Jim ran at an average speed of 875 feet per minute, and Jeremy ran at an average speed of 10 miles per hour. Who ran faster than John?
John ran a mile in 6 minutes 15 seconds 6 minutes 15 seconds--------> 6.25min 1 mile---------------> 63360 in 63360 /(6.25*60)--------> 168.96 in/sec
Joe ran at an average speed of -----------------> 168 in/sec
Jim ran at an average speed of ----------------> 875 ft/min 1 ft---------> 12 in 875 ft-------> X X---------> 10500 in 875 ft/min--------> 10500 in/min--------> 10500/60-------> 175 in/sec
Jeremy ran at an average speed of ---------------> 10 miles per hour if 10 miles-------------> 1 hour 1 mile---------------> X X=1/10------> x=0.1 hour--------> 0.1*60------> 6 minutes
10 miles/hour 1 mile---------------> 63360 in 10 mile-----------> X X=63360*10--------> X=633600 in/hour-----> 633600/3600-----> 176 in/sec
