Wilco Placement Paper Candidate Experiences Not Specified-15 Oct 2010

1. There is a escalator and 2 persons move down it.A takes 50 steps and B takes 75 steps while the escalator is moving down. Given that the time taken by A to take 1 step is equal to time taken by B to take 3 steps. Find the no. of steps in the escalator while it is staionary.Solution (not sure):

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1. There is a escalator and 2 persons move down it.A takes 50 steps and B takes 75 steps while the escalator is moving down. Given that the time taken by A to take 1 step is equal to time taken by B to take 3 steps. Find the no. of steps in the escalator while it is staionary.

Solution (not sure):

take 50 steps, then B takes 150 steps in t1 seconds. For B, to take 150 steps he requires t1 seconds,

Then to take 75 steps he requires t1/2 seconds.

So now, s1=50, t1 = t1 & s2=75, t2=t1/2

Ans= (s1*t2 ~ s2*t1) / (t1 ~ t2) which gives 100.

So 100 steps is the answer

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