Consider there is an elevator and you are at the upside and coming down using elevator. You walk 20 steps and then you stop, then you reach to the ground in 10 minutes. If you walk 10 steps and then stop, then you reach to the ground in 20 minutes. What is the speed of the elevator and How many steps are there??

• Let e be the speed of the elevator, n be the no. of steps
  n = 20 + 10*e = 10+20*e
  e=1
  n=30
  
  No. of steps : 30
  Speed : 1 step/min
  
• 10 years agoHelpfull: Yes(72) No(5)
• let total steps is n and speed is e
  elevator covered n-20 steps in 10 mins
  (n-20)/e=10.................1
  
  similarly elevator covered n-10 steps in 20 mins
  (n-10)/e=20......................2
  
  from 1 and 2
  n=30
  e=1 step/min
• 9 years agoHelpfull: Yes(29) No(0)
• ain't it shud be escalator instead of elevtor
• 9 years agoHelpfull: Yes(9) No(1)
• what abt the walkable time?
  
• 9 years agoHelpfull: Yes(1) No(1)
• 1 step for one miniute
  
• 10 years agoHelpfull: Yes(0) No(5)
• 30 steps in 30 min.
  1 step=1 min
• 9 years agoHelpfull: Yes(0) No(2)
• Thank you @Nandita ..finally I got the sum . :)
• 9 years agoHelpfull: Yes(0) No(0)
• 30 steps 1m/min
• 8 years agoHelpfull: Yes(0) No(0)