3 step of a ladder is immersed in water .if thickness of the steps is 1.5” and distance between the steps is 8” .the tide raise at the rate of 16” per hour for first 6 hrs and then it ebbs at the rate of 8” per hour .after 8 hrs how many steps will be immersed in water.

• Total distance covered in 8 hrs = 20.5+16*6-8*2=100.5
  100.5= 1.5*n+8*(n-1),where n is the no.of stairs.
  so,n=11.42 (approx 11 stairs)
• 10 years agoHelpfull: Yes(12) No(5)
• how that 20.5 came?
  
  3 step of a ladder is immersed in water .if thickness of the steps is 1.5” and distance between the steps is 8
  
  diastance b/n ladders is 8 means b/n 3 ladders disatance is 8+8=16
  and thickness is 1.5 i.e., 1.5*3=4.5
  total distance is 16+4.5=20.5 okay
• 10 years agoHelpfull: Yes(4) No(0)
• ans=5
  distance immersed in 3 steps=20.5
  after 6 hrs distance covered =20.5+36=56.5=7steps
  then for 2hrs tide ebbs at the rate of 8 per hr=56.5-16=50.5
  so 5 steps will be immersed
  
  
• 11 years agoHelpfull: Yes(3) No(8)
• hw are u getting 3 steps immersed distance as 20.5? plz rply
• 10 years agoHelpfull: Yes(0) No(1)
• i really cant get it... there is already mention that it is a 3spet ladder... how u people are finding there ans more than 3... there is somthing worng in parameter of the value given....
• 9 years agoHelpfull: Yes(0) No(2)