Question

An a enemy ship was located at distance of 35 km in nw direction by a war ship. If the enemy ship is moving of 28 kmph in. N35 E, in which direction the worship must move with a of 32 kmph, to strike aut it's earliest? Assume the fire range of war ship is 5km, when is the shell to be fired?​

Answer 1

An a enemy ship was located at distance of 35 km in nw direction by a war ship. If the enemy ship is moving of 28 kmph in. N35 E, in which direction the worship must move with a of 32 kmph, to strike aut it's earliest? Assume the fire range of war ship is 5km, when is the shell to be fired?

The radio waves, at first, reach to the plane. Then they get reflected by the plane and so the reflected radio waves reach the radar again where they get detected. So, radio waves have to travel twice the distance between the plane and the radar.

Distance between the plane and radar d-300 km

Distance traveled by radio waves D=2d=2×300-600 km

.. D=600×103 m

Speed of radio waves

v=3×108 m/s

So, time taken by radar to detect the

radio waves t=vD

t=3×108600×103-2×10-3 s

Brainliest please