2 men take turns walking and riding one horse that they share...walking speed
4km/hr..riding speed 12km/hr..one rides for some time and ties horse for the other walking fellow and continues walking......they keep going on like this alternately ..find time that the horse rests

• If total distance is 24 kms, then
  
  First person will ride for 1 hr up to 12 kms point.
  leaves horse there and walks for next 3 hrs up to 24 kms point.
  second person will walk for 3 hrs up to 12 kms point.
  Takes horse for next 1 hr to reach at 24 kms point.
  
  Hence horse rests for 2 hrs in between.
• 13 years agoHelpfull: Yes(11) No(0)
• It will depend on total distance which is not given.
• 13 years agoHelpfull: Yes(5) No(0)
• The horse will have maximum rest time of 8hrs, i.e till the next persons reaches it.
  
• 12 years agoHelpfull: Yes(0) No(0)
• 2 hours...
• 12 years agoHelpfull: Yes(0) No(0)
• 2 hr. is the ans.
• 6 years agoHelpfull: Yes(0) No(0)
• Total journey= 440 ×
  
  2=880
  
  A meet B 20 yards from the top in getting down it means he has covered 440+20=460 yards while B is 420 yards.so he is 40 yards ahead of B which is equals to 5 minute.
  
  so 40 yards in 5 min
  
  880 yards will be in 5 ×
  880/ (40) =110 minute.
• 6 years agoHelpfull: Yes(0) No(0)