Question 804185
1 pm is 13:00 
8 am is 8:00
from 8 am to noon is 4 hours plus one hour from noon to 1 pm 
It takes you 13-8=5 hours for the climb
You travel 950 vertical feet
(50 below sea level and 900 above)
950/5=190 ft per hour if the speed is constant. Obviously, you will go slower  towards the end of the climb
h=190t where h is elevation and t is the time (hours) traveled