# If Denise can run 5 km in 30 minutes and Clark can run 6 km in 39 minutes, who's faster?

Jun 11, 2018

Denise is faster

#### Explanation:

The speed is defined as the ratio between the distance you travel, and the time it takes to travel such a distance. So, Denise travels $5$ km in $30$ minutes, meaning her speed is $\frac{5}{30} = \frac{1}{6} \approx 0.16$ km per minute.

On the other hand, Clark can travel $6$ km in $39$ minutes, meaning his speed is $\frac{6}{39} = \frac{2}{13} \approx 0.15$ kilometers per minute.

So, Denise is slightly faster than Clark

Jun 11, 2018

Densie

#### Explanation:

Speed of Densie is

$\text{v"_1 = "Distance"/"Time" = "5 km"/"30 min" = "0.167 km/min}$

Speed of Clark is

$\text{v"_2 = "Distance"/"Time" = "6 km"/"39 min" = "0.154 km/min}$

${\text{v"_1 > "v}}_{2}$. Therefore Densie is faster.