In 2016, the world record for completing a 5000m three-legged race was 19 minutes and6 seconds. It was set by Damian Thacker and Luke Symonds in Sheffield.
What was their approximate average speed in km/h?
A. 10
B. 12
C. 15
D. 18
E. 25
C. 15
The average speed running 5000 m in 19 minutes and 6 seconds is approximately the same as running this distance in 20 minutes. So their average speed was approximately 5000/20 metres per minute, that is 250 metres per minute.
A speed of 250 metres per minute is the same as 60 × 250 metres per hour, that is, 15 000 metres per hour. This is the same as 15 km/h
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