Question

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

Answer 1

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 `5/30 = 1/6 approx 0.16` km per minute.

On the other hand, Clark can travel `6` km in `39` minutes, meaning his speed is `6/39 = 2/13 approx 0.15` kilometers per minute.

So, Denise is slightly faster than Clark

Answer 2

Densie

Explanation:

Speed of Densie is

`"v"_1 = "Distance"/"Time" = "5 km"/"30 min" = "0.167 km/min"`

Speed of Clark is

`"v"_2 = "Distance"/"Time" = "6 km"/"39 min" = "0.154 km/min"`

`"v"_1 > "v"_2`. Therefore Densie is faster.