Answer:
The answer is 2.4 s
Step-by-step explanation:
To find how long it took the ball to reach the end we use the formula
![t= (d)/(v) \\](https://img.qammunity.org/2021/formulas/physics/high-school/uttbvr9gmlmcsftdp7khu5jhuhc7e3gxig.png)
where
t is the time
d is the distance
v is the velocity
From the question
d = 18 m
v = 7.5 m/s
We have
![t = (18)/(7.5) \\](https://img.qammunity.org/2021/formulas/physics/high-school/ar9ytqtmpymphanrp31nrt43o8d4tohh87.png)
We have the final answer as
2.4 s
Hope this helps you