Answer:
28 minutes.
Explanation:
We can see from our graph that 12 minutes after starting the race Lynn left Kael behind and he ran at a greater speed till the race ended after 40 minutes.
To find total number of minutes Lynn ran faster than Kael we will subtract 12 from 40.
![40-12=28](https://img.qammunity.org/2019/formulas/mathematics/college/a1rl6un8mycy2q93m8uqhgpv2ith7ss4pb.png)
Therefore, Lynn ran at a greater speed than Kael for 28 minutes.