Answer:
m = 3.75 [kg]
Step-by-step explanation:
We must remember that momentum is defined as the product of mass by Velocity, therefore it can be represented by means of the following equation.

where:
P = momentum = 93.75 [kg*m/s]
m = mass [kg]
v = velocity = 25 [m/s]
Now replacing, we can clear the mass:
![P=m*v\\m=P/v\\m=93.75/25\\m=3.75 [kg]](https://img.qammunity.org/2022/formulas/physics/high-school/3qbhbg6gm3exx6dpkapjtt48nofzqhxles.png)