Answer:
1333.34 kg
Step-by-step explanation:
Given that,
The mass of the gun, m = 8 kg
Speed of the bullet, V = 50 m/s
The recoil speed of the gun, v = -0.3 m/s
We need to find the mass of the bullet. Using the conservation of momentum to find it. Let M is the mass of the bullet.

So, the mass of the bullet is 1333.34 kg.