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2014-08-17T22:55:31+05:30

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Time taken to walk both ways =  10  hrs
So time taken to walk one way = 5 hours

Time taken to walk first and drive back :   6 hrs
 So walking  one way  + driving one way = 6 hours
 Hence  5 hours + driving one way = 6 hours

It takes 1 hour to drive one way.  So it takes 2 hours to drive both ways
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