15. On an escalator, it took me 32
seconds and 35 steps to reach
bottom. However, if I am able to step
down 45 steps it would require only 24
seconds to go to bottom. How many
steps are visible when escalator is
idle?
(1 Point)
Answers
Given : it took 32 seconds and 35 steps to reach bottom or 45 steps and 24 seconds
To find : How many steps are visible when escalator is idle
Soluttion:
Let say escalator step speed is S step per secs
took 32 seconds and 35 steps to reach bottom
=> Total Steps = 32 * S + 35
took 24 seconds and 45 steps to reach bottom
=> Total Steps = 24 * S + 45
32 * S + 35 = 24 * S + 45
=> 8S = 10
=> S = 10/8
=> S = 5/4
Total Steps = 24 * S + 45
= 24 ( 5/4) + 45
= 30 + 45
= 75
75 steps are visible when escalator is idle
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