A person climbs up a stalled escalator in 60 sec. When he stands on it – McqOptions

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1.	A person climbs up a stalled escalator in 60 sec. When he stands on it then he is carried in the moving escalator in 30 sec. How much time will he take in climbing up in a moving escalator?
A.	10 sec
B.	30 sec
C.	20 sec
D.	40 sec
Answer» D. 40 sec

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