Whats the rest of the question?
Answer:1.32 s
Step-by-step explanation:
Given
The initial height of ball H=2 m
Initial velocity u=5 m/s
Height of ball at any instant is given by

The ball will hit the ground when h=0

100 is the y intercept so its graohed at (0,100)(y-axis) and it goes up every 1/55