Re: [algogeeks] an amazing amazon question!

2011-08-17 Thread sagar pareek
16, 61, 106  average speed is 45 miles/hour

On Wed, Aug 17, 2011 at 10:28 PM, priya ramesh 
love.for.programm...@gmail.com wrote:

 A car is traveling at a uniform speed.The driver sees a milestone showing a
 2-digit number. After traveling for an hour the driver sees another
 milestone with the same digits in reverse order.After another hour the
 driver sees another milestone containing the same two digits. What is the
 average speed of the driver?

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Re: [algogeeks] an amazing amazon question!

2011-08-17 Thread Romil .......
@Sagar: Could you please explain how you did it??


On Wed, Aug 17, 2011 at 10:35 PM, sagar pareek sagarpar...@gmail.comwrote:

 16, 61, 106  average speed is 45 miles/hour


 On Wed, Aug 17, 2011 at 10:28 PM, priya ramesh 
 love.for.programm...@gmail.com wrote:

 A car is traveling at a uniform speed.The driver sees a milestone showing
 a 2-digit number. After traveling for an hour the driver sees another
 milestone with the same digits in reverse order.After another hour the
 driver sees another milestone containing the same two digits. What is the
 average speed of the driver?

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 --
 **Regards
 SAGAR PAREEK
 COMPUTER SCIENCE AND ENGINEERING
 NIT ALLAHABAD

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Re: [algogeeks] an amazing amazon question!

2011-08-17 Thread Rohit Srivastava
logic plz?

On Wed, Aug 17, 2011 at 10:35 PM, sagar pareek sagarpar...@gmail.comwrote:

 16, 61, 106  average speed is 45 miles/hour


 On Wed, Aug 17, 2011 at 10:28 PM, priya ramesh 
 love.for.programm...@gmail.com wrote:

 A car is traveling at a uniform speed.The driver sees a milestone showing
 a 2-digit number. After traveling for an hour the driver sees another
 milestone with the same digits in reverse order.After another hour the
 driver sees another milestone containing the same two digits. What is the
 average speed of the driver?

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 --
 **Regards
 SAGAR PAREEK
 COMPUTER SCIENCE AND ENGINEERING
 NIT ALLAHABAD

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Re: [algogeeks] an amazing amazon question!

2011-08-17 Thread Aditya Virmani
+1 sagar pareek...
i used the following approach:
let the num be xy
so...
(10y + x) - (10x + y) is the distance travelled in 1 hr...
now, the the next milestone must be a three digit number, which can be of
following compostion: 1xy or xzy or yzx whr 0=z9 coz aif z=9, distance
travlled in tht hr wud be more thn 100, which can nt be the case( in
contradiction with the distance in 1st hr)...
now if its 1xy,
9(y-x) = 100 + 9 (x-y) which can nt give integral soln..so num must be
xzy...thn
9(y-x) = 99x + 10z - 9y...
now fr integral solution: z must be a multiple of 9, can be 0 or 9...
hence it has to be 0.
so 9(y-x)=9(11x-y)
2y=12x
y=6x
posbl soln:
x=0,y=0...rejected
x=1, y=6...
accepted

On Wed, Aug 17, 2011 at 11:22 PM, Rohit Srivastava
access2ro...@gmail.comwrote:

 logic plz?

 On Wed, Aug 17, 2011 at 10:35 PM, sagar pareek sagarpar...@gmail.comwrote:

 16, 61, 106  average speed is 45 miles/hour


 On Wed, Aug 17, 2011 at 10:28 PM, priya ramesh 
 love.for.programm...@gmail.com wrote:

 A car is traveling at a uniform speed.The driver sees a milestone showing
 a 2-digit number. After traveling for an hour the driver sees another
 milestone with the same digits in reverse order.After another hour the
 driver sees another milestone containing the same two digits. What is the
 average speed of the driver?

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 --
 **Regards
 SAGAR PAREEK
 COMPUTER SCIENCE AND ENGINEERING
 NIT ALLAHABAD

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Re: [algogeeks] an amazing amazon question!

2011-08-17 Thread rajul jain
what abou 16 , 61 , 116 so avg 55 m/hr

On Wed, Aug 17, 2011 at 10:35 PM, sagar pareek sagarpar...@gmail.comwrote:

 16, 61, 106  average speed is 45 miles/hour


 On Wed, Aug 17, 2011 at 10:28 PM, priya ramesh 
 love.for.programm...@gmail.com wrote:

 A car is traveling at a uniform speed.The driver sees a milestone showing
 a 2-digit number. After traveling for an hour the driver sees another
 milestone with the same digits in reverse order.After another hour the
 driver sees another milestone containing the same two digits. What is the
 average speed of the driver?

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 --
 **Regards
 SAGAR PAREEK
 COMPUTER SCIENCE AND ENGINEERING
 NIT ALLAHABAD

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Re: [algogeeks] an amazing amazon question!

2011-08-17 Thread Prithu Banerjee
@sagar. Can you please explain how you got the solution? Is there any proper
math involved??

On Wed, Aug 17, 2011 at 10:35 PM, sagar pareek sagarpar...@gmail.comwrote:

 16, 61, 106  average speed is 45 miles/hour


 On Wed, Aug 17, 2011 at 10:28 PM, priya ramesh 
 love.for.programm...@gmail.com wrote:

 A car is traveling at a uniform speed.The driver sees a milestone showing
 a 2-digit number. After traveling for an hour the driver sees another
 milestone with the same digits in reverse order.After another hour the
 driver sees another milestone containing the same two digits. What is the
 average speed of the driver?

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 --
 **Regards
 SAGAR PAREEK
 COMPUTER SCIENCE AND ENGINEERING
 NIT ALLAHABAD

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