A person walks up a stalled escalator in 90 s. When standingon the sam – InterviewSolution

InterviewSolution

1.	A person walks up a stalled escalator in 90 s. When standingon the same escalator, now moving, he is carried in 60 s.The time it would take him to walk up the moving escalator will be:A. 27sB. 72sC. 18 sD. 36s
Answer» Correct Answer - D speed of man `(v_(m))=(d)/(90)` speed of escaltor `(v_(s))=(d)/(60)` `t=(d)/(v_(m)+v_(s))=(d)/((d)/(900)+(d)/(90))=(60xx90)/(150)=36` sec

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