posted by Anonymous on .
A ditch 2.5 wide crosses a trail bike path (see the figure(Figure 1) ). An upward incline of 15 has been built on the approach so that the top of the incline is level with the top of the ditch.
What is the minimum speed a trail bike must be moving to clear the ditch? (Add 1.7 to the range for the back of the bike to clear the ditch safely.)