Answer:

When t=1, the velocity of the particle is 4+2=6 m/s.

When t=2, the velocity of the particle is 4+2×2=8 m/s.

After t seconds, the velocity of the particle is 4+2t m/s.

given distance covered by car=200m

time taken to cover the distance=2s

Speed=Distance/Time taken

speed=200/2

speed=100m/sec

Here Car moves in one direction only

So, Displacement=200m

Velocity=Displacement/Time taken

velocity=200/2

velocity=100m/sec

So required Speed=100m/sec

Velocity=100m/sec