Answer:
The spotter above the tunnel will observe the speed of the spy as 95 km/h, and the person in the car will observe the speed of the spy as 200 km/h
Explanation:
Velocity of spy is 95 km/h in the direction of train
Helicopter is flying above the train with same speed as that of train
so here by the concept of relative velocity
= velocity of train with respect to helicopter
now we can say that as per the helicopter the spy will remain at rest
Now another guy is above a tunnel and standing there at rest
so here the guy is in stationary frame so he will observe the real speed of the spy
so as per second guy the speed of spy is 95 km/h
now third guy is inside a car moving in opposite direction of the spy
so here we have
= speed of train with respect to car
so third guy will see the spy is moving towards him with speed 200 km/h
so correct answer will be
The spotter above the tunnel will observe the speed of the spy as 95 km/h, and the person in the car will observe the speed of the spy as 200 km/h