A car moving with constant acceleration covers two successive kilometers in 30 sec and 20 sec respectively. The acceleration of car is :-

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2 2 u + 30 a ​ × 30 = 1000 ⇒ 6 u + 90 a = 200 ....(i) ( 2 2 u + 80 a ​ ) × 20 = 1000 ⇒ u + 40 a = 50 ....(ii) Solving (i) & (ii) we get a = 2/3 m / s 2

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