The correct answer among all is D. I'm in K12 8th grade by the way so nice to meet you :)
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!
y>3x+6
y>4/3x-5 <- (The sign is greater than or equal to btw)
11*13=143
11+13=24
The sum of the two consecutive odd integers is 24
