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Question

If a car at rest accelerates uniformly to a speed of 144 km/h in 20 second, it covres a distance of :-
  1. 400 m
  2. 20 m
  3. 1440 m
  4. 2980 m

A
20 m
B
400 m
C
2980 m
D
1440 m
Solution
Verified by Toppr

speed of car after 20 sec. =144km/h=144518m/s=40m/s
v=u+at40=0+20aa=2m/s2
Distance covered s=ut+1/2at2=020+122202=400m

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