Answer:
11.56066 m/s
Explanation:
m = Mass of person
v = Velocity of person = 13.4 m/s
g = Acceleration due to gravity = 9.81 m/s²
v' = Velocity of the person in the second
The kinetic and potential energy will balance each other at the surface

Height of the cliff is 9.15188 m
Let height of the fall be h' = 2.34 m

The speed of the person is 11.56066 m/s