A woman is walking down a downward-moving escalator and steps down 10steps to reach the bottom. Just as she reaches the bottom of the escalator, a sale commences on the floor above. She runs back up the downward moving escalator at a speed five times that which she walked down. She covers 25 steps in reaching the top. How many steps are visible on the escalator when it is switched off?

• v.x/v+n=10...(1)....5v.x/5v-n=25..solve this x=20steps
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• 24 ;since wheather the esclatot is moving downward ,she reached at the top in 25th step,so there are 24 Stairs.
  
• 10 years agoHelpfull: Yes(0) No(0)