5. Victor takes an escalator in the metro station. When he runs 10 steps on the escalators, it takes him 40 seconds to reach the top; whereas when the runs 20 steps, it takes him 25 seconds. What is the total number of steps in the escalator?
a) 36
b) 38
c) 40
d) 32

• let total number of steps be x
  when Victor takes 10 steps:
  distance/steps remaining = (x-10), time = 40 sec, speed = (x-10)/40
  when Victor takes 20 steps:
  distance/steps remaining = (x-20), time = 25 sec, speed = (x-20)/25
  but speed of escalator won't change, so:
  (x-10)/40 = (x-20)/25
  => x = 36.667 = 36 steps
• 10 years agoHelpfull: Yes(45) No(0)
• ans is 36
  sped is same,takng total steps X
  x-10/40 = x-20/25
  x=36
• 10 years agoHelpfull: Yes(9) No(7)
• @APOORVA DESHPANDE..........in x-10/40=x-20/25, x will be cancel out so how u can get the value of x????
  
• 10 years agoHelpfull: Yes(6) No(16)
• 10 steps climb- 40 sec to reach
  20 steps climb- 25 sec to reach
  subtract the above 2 equations gives:
  10 steps in 15 sec
  x sec for 1 step
  x=15/10= 1.5 sec
  so 1 step = 1.5 sec
  10 steps+(40/1.5)= 36
  
• 10 years agoHelpfull: Yes(5) No(1)
• how it will be canceled 40 and 25 is in division of X also
• 10 years agoHelpfull: Yes(3) No(3)