Trisha ran 10 km in 2.5 h. Jason ran 7.5 km in 2 h. Olga ran 9.5 km in 2.25 h. Who had the fastest average speed?

1 Answer
Shwetank Mauria
Sep 21, 2017

Olga has the fastest average speed.

Explanation:

Average speed is total distance covered divided by total time taken.

Hence, average speed of Trisha is #10/2.5=10/(25/10)=10xx10/25=100/25=4# #km.# per #h#.

Average speed of Jason is #7.5/2=7.50/2=3.75# #km.# per #h#.

Average speed of Olga is #9.5/2.25=(95/10)/(225/100)=95/10xx100/225=950/225=38/9=4.22# #km.# per #h#.

Hence, Olga has the fastest average speed.

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