Answer:341232 m/s^2
Explanation: you are given velocity, 1.20x10^4
distance, 211m (the 274m don't matter here)
with this information, you use the 3rd kinematic equation, vf^2-vi^2=2a(xf-xi)
vf and vi can just combine to become V (same with x)
divide ay on both sides to make a stay by itself
you are left with a=V^2/2x
plugin, 1.20x10^4/2x211
put it through a calculator and you get 341232 m/s^2
and I'm assuming you are doing MasterPhysics since I just did mine there so the answer for you is either 340000 m/s^2 or 3.4x10^5 m/s^2