FIND THE DISTANCE BETWEEN A and B

PROBLEM:

Here is a road with a straight portion,up and down.A particular vehicle will travel through straight with a velocity of 63 kmph,56 kmph through up and 72 kmph through down.The car takes four hours time to travel from A to B, And takes four hour and 40 min. to travel back , that is from B to A.Then the question is what is the distance between A to B ?

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CROSSING LADDER PROBLEM

YOU MAY KNOW THE CROSSING LADDER PROBLEM ,BUT THIS BRAIN TEASER IS NOT LIKE THAT .

  

 The problem

Here is a room with two inclined parallel walls.And two ladders are kept inside the room as seen in the picture.The distance between top of the two ladder is 5 ,and distance between the crossing and top of the left ladder is 4.And the question is ,what is the distance from floor to crossing ?

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