Yea that’s a nice graph i’d say looks a little fishy though
$230 divided by 1/4 = 57.5
The answer to your question is 10 seconds. I know this because:
distance divided by speed=time
let t=time
t=2*6(30/36)=10
t=10
So, it took Boris a total of 10 seconds to run up the out of service elevator.
Hope this helps!