RONG...him RAN 100meters in 9.3 sek, so his speed WAS......
100/9.3=10.75268817 m/sekond
1 meter=3.280839895 ft, so speed=35.27784833 ft/sek
1 mile=5,280 ft & 1 our=3,600 sekonds, so 1 MPH=1.466666666...ft/sek
so (35.277848 ft/sek)/1.46666666=24.053089 MPH
or 24 MPH