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JEE Main & Advanced Physics Motion in a Straight Line / सरल रेखा में गति Question Bank Self Evaluation Test - Motion in a Strainght Line

  • question_answer
    A bus travelling the first one third distance at a speed of 10 km/h, the next one third at 20 km/h and the last one-third at 60 km/h. The average speed of the bus is

    A) 9 km/h

    B) 16 km/h

    C) 18 km/h        

    D) 48 km/h

    Correct Answer: C

    Solution :

    Average speed \[=\frac{s}{\frac{s/3}{10}+\frac{s/3}{20}+\frac{s/3}{60}}=\frac{s}{s/18}=18km/h\]


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