Latest Infosys Aptitude Question SOLUTION: There Is An 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 T

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(#M40003586) INFOSYS Numerical Ability question escaletor Keep an EYE

There Is An 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 Stationary.

Asked In Infosys sairam bandaru (12 years ago)

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Dr.Dipin Singh  (12 years ago)

If S is no of steps In The Escalator While It Is Stationary.
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.

If A takes time 't' secs to take 50 steps, B takes (t/50)*(75/3) = t/2 secs

Then speed of escalator remains same in 2 cases.
so (S-50)/t = (S-75)/2t
so S -50= 2s-150
s=100

Is this solution Helpfull? Yes (17) | No (1)  

kiran kumar reddy  (12 years ago)

If A takes 1 step in one second, then B takes 3 steps in one second. If A takes t1 seconds to 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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