Question

A cyclist rides her bike at a rate of 27 kilometers per hour. What is this rate in meters per second? How many meters will the cyclist travel in 15 seconds? Do not round your answers.

Answer 1

All you need to do is convert the units from km/h to meters/second. In 1 kilometer, there is 1000 meters. In 1 hour, there is 60 mins, and in 60 mins, there is 3600 seconds.
27kilometers/hour = 27000 meters/3600 seconds = 7.5 meters/second.

Now all you need to do to figure out how many seconds the cyclist travels in 15 seconds is to multiply 7.5 meters/second by 15, which is 112.5 meters.