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JEE Main & Advanced Sample Paper JEE Main Sample Paper-40

  • question_answer
    Drops of water fall from the roof of a building 9m high at regular intervals of time. The first drop reaching the ground at the same instant fourth drop starts its fall. What are the distances of second and third drops from roof?

    A) 6m & 3m                    

    B) 4m & 2m

    C) 6m & 2m                    

    D) 4m & 1m

    Correct Answer: D

    Solution :

    Let t be the time interval between the drops. \[3t=1.34\Rightarrow t=0.44\sec .\] For second drop, h \[\frac{1}{2}\]x10x0.88x0.88=4.05 m. For third drop :h\[\frac{1}{2}\]x10x0.4x0.4= 1.05m.


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