Question

Bicyclists in the Tour de France reach speeds of 34.0 miles per hour (mi/h) on flat sections of the road. What is this speed in (a) kilometers per hour (km/h) and (b) meters per second (m/s)

Answer 1

Answer: a) The speed in km/hr is 54.7.

b) The speed in m/s is 15.2

Explanation:

a) The conversion used from miles to km is:

1 mile = 1.61 km

34.0 miles= $\frac{1.61}{1}\times 34.0=54.7km$

We are asked: 34.0 miles/hr = ? km/hr

Thus 34.0 miles/hr = $\frac{54.7}{1}=54.7km/hr$

Therefore, the speed in kilometer per hour is 54.7 km/hr

b) The conversion used from miles to m is:

1 mile = 1610 m

34.0 miles= $\frac{1610}{1}\times 34.0=54740m$

The conversion used from hour to sec is:

1 hour = 3600 sec

We are asked: 34.0 miles/hr = ? m/s

Thus 34.0 miles/hr = $\frac{54740m}{3600s}=15.2m/s$

Therefore, the speed in meters per second is 15.2 m/s