Question

A runner wants to run 10.4 km . She knows that her running pace is 7.6 mi/h .

How many minutes must she run? Hint: Use 7.6 mi/h as a conversion factor between distance and time. Express your answer using two significant figures.

Answer 1

The runner should run 51 minutes.

Step-by-step explanation:

Distance wished by runner to cover = d = 10.4 km

Time taken by the runner to cover 10.4 km = T

Speed of the runner = 7.6 mile/hour

1 mile = 1.60934 km

1 hour = 60 min

`7.6 mile/Hour=(7.6* 1.60934 km)/(1* 60 min)=0.2038 km/min`

`Speed=(Distance)/(Time)`

`T=(10.4 km)/(0.2038 km/min)=51.0179 min\approx 51 minutes`

The runner should run 51 minutes.