There is well of depth 30 m and frog is at bottom of the well. He jumps 3 m in one day and falls back 2 m in the same day. How many days will it take for the frog to come out of the well?

• 28 days
  
  Effective height covered in 1 day = 3 - 2 = 1 m.
  So in 27 days 27 m. will be covered.
  On 28th day distance of 27+3=30 m is covered and will come out of the well.
• 6 years agoHelpfull: Yes(47) No(4)
• 28 days
  
  Day 1 – It jumps 3 meters. 0 + 3 = 3.
  Then falls back 2 at night. 3 – 2 = 1
  Day 2 – It jumps 3 meters. 1 + 3 = 4.
  Then falls back 2 at night. 4 – 2 = 2.
  …
  
  Day 27 – It jumps 3 meters. 26 + 3 = 29.
  Then falls back 2 at night. 29 – 2 = 27.
  Day 28 – It jumps 3 meters. 27 + 3 = 30
• 6 years agoHelpfull: Yes(10) No(0)
• 28 days
  1 day=3-2=1m
  so on 27th day (29-2)=27m
  so on the 28th day,
  27+3=30m
• 6 years agoHelpfull: Yes(7) No(3)
• 27 days
  
  1 day = 1 m
  on 27th day, he takes 3 steps and comes out of well.
• 6 years agoHelpfull: Yes(5) No(15)
• 28 days
  1st day covered = 3-2 = 1m
  2nd day covered = (1+3)-2 =4-2=2m
  .........
  28th day covered = (27+3) =30m frog ll come out
• 6 years agoHelpfull: Yes(5) No(0)
• At 29 th day frog steps 3 m up and hence at 29th day it will come out
  Hence answer is 29
• 6 years agoHelpfull: Yes(4) No(16)
• Frog jumps 3 m in day & falls back 2 m at night
  so,frog will be 3 – 2 = 1 m up in a day.
  Thus, in 27 days it will be 27 m up
  On 28th day it will be at top i.e 27 + 3 = 30 m & will not fall down.
• 6 years agoHelpfull: Yes(3) No(0)
• 28 days.
  Frog jumps 3m in a day & falls back 2m at night.
  So,frog will be 3-2=1m up in a day.
  Thus,in 27 days it will be 27m up
  On 28th day it will be at top i.e. 27+3=30m & will not fall down.
• 6 years agoHelpfull: Yes(1) No(0)
• 30 days
  jump 3m and fall back 2 m, so gain 1m in 1 day
  so it take 30 days to complete 30 m.
• 6 years agoHelpfull: Yes(0) No(9)
• Depth of well=30
  Jumps in one day=3
  Falls in 1 day=2
  3-2=1
  Jumps 1 m / day so it will take 30 days to jump out of 30 m well
• 6 years agoHelpfull: Yes(0) No(5)
• 30 days
  3m up-2m down=1m
  total 30 m
  so 30 days
• 6 years agoHelpfull: Yes(0) No(6)
• 30 days since he climb 1 m in one day
• 6 years agoHelpfull: Yes(0) No(7)
• net value he steps one day is 1 ((3-2)
  so for 27 th day he will step upto 29 meters.
  at 28th day he will climp upto 30 meteres and will not slip in this case as he is aleady out
• 6 years agoHelpfull: Yes(0) No(0)
• 25 right answer
• 6 years agoHelpfull: Yes(0) No(2)
• 27 26 day he jump 26 miter then 27 days hi jump 3m and totally distance completed came out the well
• 6 years agoHelpfull: Yes(0) No(0)
• 3 m up and 2 m down -> 1 m per day
  so 27 meters up for 27 days + 3 m up in the 28th day
  = 28 days
• 6 years agoHelpfull: Yes(0) No(0)
• after 27 days the frog will jump 3m and it will come out of the well.so 28 days
• 6 years agoHelpfull: Yes(0) No(0)
• 28....after 27 m ..he will jump to 30..so 28 times.
• 6 years agoHelpfull: Yes(0) No(0)
• 30 days , because every day it reaches one metre height.
• 6 years agoHelpfull: Yes(0) No(2)