Question

Jack can run 6km race in 37 minutes. If he runs at the same rate, how long should it take for an 8km race?

Answer 1

We have to calculate how much it will take for Jack to run a 8 km race.

The rate is given by the fact that he can run 6 km in 37 minutes.

Then, we can express the rate as:

$v=\frac{6\text{ }km}{37\text{ }min}$

We can calculate the time as the distance divided by the rate:

$\begin{gathered} t=\frac{d}{v} \\ \\ t=8\text{ }km\cdot\frac{37\text{ }min}{6\text{ }km}\approx49.33\text{ }min \end{gathered}$

Answer: it will take Jack approximately 49.33 minutes.