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Question
pavan walked up a descending escalator and took 154 steps in 100 sec to reach the top. Rishabh started simultaneously from the top taking 3 steps for every 4 steps taken by pavan, reach the bottom in 40sec. How many steps from bottom were they when they crossed each other?
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Answer
Total steps = N
Speed of escalator = e
N/4x - e = 154/4x = 100
N/3x+e = 40
Solving, we get N = 77, x = 77/200 and e = 77/100
They will meet after 77/4x+3x seconds, i.e. 200/7 seconds
Number of steps from bottom = (4x-e)*200/7 = 22 steps
Hope this helps!
