frog starts climbing a 30ft wallEach hour he climbs 3ft and slips back 2How many hours it take to reach on top

• 3hour
  as if he climb 3 ft he actully able to climb 1 ft soo he have to climb 90 ft to cover 30 ft so total 3 hr
  
  
  30............................................10ft
  
• 9 years agoHelpfull: Yes(0) No(0)
• frog climbs 30ft wall of speed 3ft/hour
  slips back 2ft means it climb 1ft/hour
  1hour-> 1ft
  2hour->2ft
  3hour->3ft.
  .
  .
  .
  .
  .
  . after 27 hours->27ft
  finally at the 28 hours -> 30ft mean frog will be on wall top
• 9 years agoHelpfull: Yes(0) No(0)