I have been drawing a straight line while solving the problem. I agree that I don't see how I can get enough information. There is nothing else mentioned - I copied it exactly.
Also, the answer that the book gives is 4 ms^-2 for the deceleration, and 56 ms^-1 for the velocity at E.
I've been attempting to solve this problem for three days now. I have thrown away my old attempts (like, scrumpled up into the bin), but my old attempts involved:
Trying to set up simultaeneous equations relating the journeys between EH and FG to find the deceleration, but the reason why this...
Acceleration
Constant
Constant acceleration
Kinematic
Kinematic equations
Kinematics
Kinematics problem
Line
Linear acceleration
Linear motion
Motion
Suvat