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NTSE Sample Paper NTSE SAT Practice Test-18

  • question_answer
    When 2 bodies move uniformly towards each other, the distance between them decreases by 6 m/s. If both bodies move in the same direction with the same speeds (as above), the distance between them increases by 4 m/s. Then the speed of the two bodies are;

    A) 4 m/s, 2 m/s      

    B) 5 m/s, 1 m/s

    C) 3 m/s, 7 m/s      

    D) 3m/s, 7 m/s.

    Correct Answer: B

    Solution :

    [b] Let \[u\] and \[v\] be the velocities of two bodies. When they move in opposite directions, relative velocity = u + v = 6 m/s                  .....(i) When they move in the same direction relative velocity = u - v = 4 m/s                    ......(ii) Solving (i) and (ii) we have, u = 5 m/s and v = 1 m/s


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