InterviewSolution
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InterviewSolution
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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 the moving escalator will be.A. `(t_(1)+t_(2))//2`B. `t_(1)t_(2)//(t_(2)-t_(1))`C. `t_(1)t_(2)//(t_(2)+t_(1))`D. `t_(1)-t_(2)` |
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Answer» Correct Answer - C velocity of girl `v_(g)=(L)/(t_(1))` Velocity of escalator `v_(e)=(L)/(t_(2))` Net velocity of the girl`=v_(g)+v_(e)=(L)/(t_(1))+(L)/(t_(2))` `(L)/(t)+(L)/(t_(1))+(L)/(t_(2))impliest=(t_(1)t_(2))/(t_(1)+t_(2))` |
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