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        riddles >> easy >> escalator steps
        
(Message started by: Noke Lieu on Nov 1st, 2009, 5:32pm)
Title: escalator steps
Post by Noke Lieu on Nov 1st, 2009, 5:32pm
If I walk up the up-escalator taking one step per
second, I make 20 steps before arriving at the top. If I take two steps per second, I take 32 steps before reaching the top. How long would it
take to get to the top standing still?

(borrowed from http://www.basicskillsbulletin.co.uk/Portals/1/Samples/NBSampleIssue.pdf)
Title: Re: escalator steps
Post by kg on Nov 1st, 2009, 10:00pm
[hide]
time taken 20 secs and 16 secs for each case
if speed of elevator is v

20v + 20 = 16v+32
v=3 steps/sec

so length total steps is 80

time taken if standing still 80/3

[/hide]
Title: Re: escalator steps
Post by anuragvickey on Nov 2nd, 2009, 11:30pm
3


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