Answer:
he average speed for the airplane is 558 km/hr
Explanati
Answer:
Energy May be measured in joule
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

Force=A×M
10m/s×0.20kg
=2Newton