a bike man start his journey at 9a.m he saw a milestone that showed a three digits no.At 10am he saw a another milestone that showed a two digit no and both digits were also there in the first milestone's no.At 11am he saw another milestone that showed the reversed no of 2nd milestone.
the sum of digit in all milestone is same.if the bike man travelling at uniform speed then what is his speed?
1. 45kmph
2. 30kmph
3. 27kmph
4. 54kmph

• 3digit _ _ _
  2 digit _ _
  2digit _ _ (places reversed)
  
  Since the 3digit number contains 0 as one of its digit, we can certainly say that it has to be placed in the ten's place. This is so because the difference between the 3 milestones has to be same.
  And it is bound to be in the range of 40-50 as in the first case digits are reversed and in the second case it attains a 3-digit value.
  
  Possibly number can be:
  15............51............105
  But difference is unequal
  
  Checking for
  16.............61...............106
  Difference=106-61=61-16=45
  Hence the speed is 45km/hr
• 8 years agoHelpfull: Yes(6) No(0)
• 45!!!......total 3 hrs and for distance trail and error method
  
  finally will get speed=135/3==45
• 12 years agoHelpfull: Yes(0) No(5)