A frog starts climbing 30 feet wall. Each hour he climbs 3 feet and slips back 2 feet. How many hours does the frog take to reach the top.

• 21 bcoz on the 21st hr the frog will reach the top
• 9 years agoHelpfull: Yes(0) No(2)
• on first hour frog covers (3-2)=1feet distance
  on second hour frog covers 1+3=4-2(slip)=2 distance....
  =>every hour frog cover 1feet distance
  on 27th hour frog covers 27feet distance
  but, on 28th hour frog reach to 30 feet =>27+3
  ==>28 hours
• 9 years agoHelpfull: Yes(0) No(0)
• after 1 hour it will climb only 1 feet
  after 27th hour it will climb upto 27 feets
  then after 28th hur it will climb 31 feets
  so it will take 28 hours to climb 30 feet wall
• 9 years agoHelpfull: Yes(0) No(0)
• ans must be 27
• 9 years agoHelpfull: Yes(0) No(0)
• height of wall=30 feet
  so it climbs 3 feet and slips 2 feeet
  26 hours=26 feet
  27 hour=30 feet
  so ans is 27hrs
• 9 years agoHelpfull: Yes(0) No(0)