An escalator having 60 steps is moving up at the speed of 2 steps/second. Aakash has to go to first floor and come back on this escalator. Calculate time taken by Akash, if his speed on stationery escalator is 3 steps/second.
Explanation:
Speed of Akas while going upstairs = 3 + 2 = 5 s/s.
Time take to go up = 60/5 = 12 seconds.
Speed of Akas while going downstairs = 3 - 2 = 1 s/s.
Time take to come down = 60/1 = 60 seconds.
⇒ Total time taken by Akash = 12 + 60 = 72 seconds.
Hence, 72.
» Your doubt will be displayed only after approval.
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.