We are already told that the velocity with which an object hits the ground is given by
![v=\sqrt[]{19.6h}](https://img.qammunity.org/2023/formulas/mathematics/high-school/jcj9sc0z7zqqb8ldy9q1jtnh992xobaxo0.png)
and we are asked to find the velocity when h = 49.5. To do this we just substitute 49.5 for h in the above equation to get
![v=\sqrt[]{19.6*49.5}](https://img.qammunity.org/2023/formulas/mathematics/high-school/4xuy9crzao9m4cflsnd0w1493yvewqy3k3.png)
which evaluates to (the nearest tenth)

which is our answer!