A car is travelling at uniform speed.the driver sees a milestone showing a two digit number which is a perfect square,after travelling for an hour the driver sees another milestone with the same digits in reverse order and after another hour the driver sees another milestone containing the same two digits as part of a three digit number.what is the speed of the car?
(a)30kmph(b)40kmph(c)50kmph(d)60kmph(e)45kmph

• e) first milestone lies btw. 16 and 49 because after this reverse i.e second milestone will be less than first milestone. taking first=16
  second=61 difference=45
  third=61+45=106 (1 and 6 part of this satisfied condition)
  speed of car is 45 kmph
  
  
  
• 14 years agoHelpfull: Yes(24) No(1)
• 1st 2 digit no.should be one of the :16, 25, 36, 49, 64, 81 (perfect squares)
  After 1 hour...reversing the digits 61, 52, 63, 94, 46, 18
  Speed of car should be one of the given: 45, 27, 27, 45, NA, NA
  After another hour nos. on milestones 106, 79, 90, 139
  So in this case 106 is the answer which is fulfilling all conditions..Thanks
  
• 13 years agoHelpfull: Yes(17) No(1)
• 45 kmph.
  16 km first milestone which is perfect square.
  add it in 45 after 1 hour it will be 61. which is reverse.
  then after 1 hour it will be 61+45=106 where u can see both degit 1 and 6.
  lion on hunt.
  
• 13 years agoHelpfull: Yes(3) No(0)
• answer is 45kmph
  First its given that first milestone contains a 2digit no. which is a perfect square.. It can be 16 25 36 49 64 or 81
  Then its given he finds a milestone with the same 2 digit no. but in reverse order. Now we can only think of nos 61(16) 52(25) 63(36) 94(49)
  Again after an hour he finds a milestone having those two digits in a 3 digit no. Now solving above , speed (if 16 is correct)= (61-16)/1hr = 45kmph
  now think of 2 digit no. Let it be 106.. again we get speed=45kmph..
  We cannot get the same answer again when we do with any other squares
• 13 years agoHelpfull: Yes(3) No(0)
• 45kmph
• 14 years agoHelpfull: Yes(1) No(0)
• 45kmph..... let x is first milestone y is second one. Y-X < 100 according to options... so find out the X and Y by checking the perfect squares between 100... 16,61 25,52 49,94... apply the condition
• 13 years agoHelpfull: Yes(0) No(0)
• the ans is (E) i.e., 45 kmph.....
  first the saw 16 on the milestone which is the sq. of 4.....after travelling at a speed of 45 kmph he saw another milestone of 16+45=61 and after an hour the milestone showed him 61+45=106 kmph......
• 13 years agoHelpfull: Yes(0) No(0)