Answer:
1.25kg
Explanation:
Simply multiply volume and density together
We use the equation of motion for vertical component,

Here,
is displacement of bullet,
is vertical initial velocity of bullet which is equal to zero because bullet was fired horizontally, and t is time of flight.
Therefore,

Given, 
Substituting the values, we get time of flight

Answer:
A. The sum of all the forces acting on an object.