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Question

A person taking part in a triathlon records his average speed for the three events - running, cycling and swimming. His average speed in swimming was 18 km/h, average speed in running was 7 m/s and the average speed in cycling was 2 km/min. Based on the given information, which of the following statement(s) is/are true?


  1. The average speed of cycling is higher than swimming and running.

  2. The average speed of swimming is higher than cycling and running.

  3. The average speed of  running is higher than swimming.

  4. The average speed of all the three is the same.


Solution

The correct options are
A

The average speed of cycling is higher than swimming and running.


C

The average speed of  running is higher than swimming.


All the metrics have to be converted to the same units for easy comparison.

Let us convert it to m/s for convenience.

Speed while swimming 18 km/h=18×518 m/s=5 m/s

Speed while running 7 m/s

Speed while cycling 2 km/min
=2×(100060) m/s=33.3m/s

Therefore, the comparison of average speeds is as follows:

Cycling > Running > Swimming

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