Question

a student climbs up 5 stairs every second and then climbs down 2 stairs over the next second. how many second will he take to climb 60 stairs

Answer 1

it will take student 40 seconds to climb 60 stairs

Answer 2

hey mate here is your Answer.!!

  1second =5steps
  2seconds = -2steps = 3steps  
Therefore, 2sec = 3steps
60 sec = 60/3=20
20 X no. of sec per 3 steps (2)
= 40seconds
I hope it will be useful for you!!!
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