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Question

A person taking part in triathlon records his average speeds when running, cycling and swimming. His average speed when swimming was 18 km/h, average speed when running was 7 m/s and the average speed when cycling was 2 km/min. Based on the given information, which of the following statements are true?


A

The average speed when cycling is higher than swimming and running

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B

The average speed when swimming is higher than cycling and running

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C

The average speed when running is higher than swimming and cycling

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D

The average speed of all the three is the same.

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Solution

The correct option is A

The average speed when cycling is higher than swimming and running


All the metrics have to be converted to the same unit for easy comparison. Let us convert it to m/s for convenience.

Speed while swimming 18 km/h=18(11000km13600hr)=5 m/s
Speed while running 7 m/s
Speed while cycling 2km/min=2(11000km13600hr)=33.3 m/s

Therefore, the comparison of average speeds is as follows:

Cycling > Running > Swimming


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