Experts plz Answer

Experts plz Answer O A lakes 0 s to apply brakes soon he a Child on the road I i a speed of km,'h and the brakes cause a deceleration 0 the car. after heapply the brakes is

The car is moving at speed of 54 km/hr i.e., 15 m/sec

that is initial speed after applying brakes is (u) = 15 m/sec

say  at point A,  he sees the need to put brakes

        at point B,  he puts brakes and then car starts deceleratin

         at point C,  car finally comes to rest

from A to B it moves with speed of 15m/sec in 0.2 sec

so distance covered is S₁ = v.t = 15*0.2 = 3 mts

from B to C it moves with constant deceleration of -6 m/sec2 and initial speed of 15m/sec

Using relation V² - u² = 2*(-a)*S

S₂ = V²/2*a = 15*15 /(2*6) =18.75 mts

the distance travelled by car after he sees need to put brakes is S₁+S₂

 = 21.75 mts  ( nearly 22 mts)