Answer:
The speed of the ball just before it strikes the ground is 15.90 m/s.
Step-by-step explanation:
Given that,
Height = 109 m
Distance = 75 m
We need to calculate the time
Using formula for horizontal projectile

Where, h = height
Put the value into the formula


We need to calculate the speed of the ball just before it strikes the ground
Using formula of speed

Where, v = speed
d = distance
t = time
Put the value into the formula


Hence, The speed of the ball just before it strikes the ground is 15.90 m/s.