2. Sample Papers
  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main - Mock Test - 39

  • question_answer
    At a metro station, a girl walks up a stationary escalator in time\[{{t}_{1}}\]. If she remains stationary on the escalator, then the escalator take her up in time\[{{t}_{2}}\]. The time taken by her to walk up on the moving escalator will be -

    A) \[\left( {{t}_{1}}+{{t}_{2}} \right)/2\]         

    B)        \[{{t}_{1}}{{t}_{2}}/\left( {{t}_{2}}-{{t}_{1}} \right)\]

    C) \[{{t}_{1}}{{t}_{2}}/\left( {{t}_{2}}+{{t}_{1}} \right)\]      

    D)        \[{{t}_{1}}-{{t}_{2}}\]

    Correct Answer: C

    Solution :

    [c] \[t=\frac{{{t}_{1}}{{t}_{2}}}{{{t}_{1}}+{{t}_{2}}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner