At a railway station a girl walks up stationary escalator in time 20 seconds. If she remains stationary on the moving escalator takes her up in time 30 seconds . What is the time taken by her to work on the moving escalator? Pls reply fast ....It's very urgent. .....
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I think answer will be 50 but I am not sure
tithimaji:
No...wrong answer
hallo
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