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Usha Putrevu

CAT Preparation Community 9y ago

Two friends A and B started from X and Y for Y and X respectively. They turned back after reaching their destinations and returned back to their starting points. When they met for the first time they were 15 km away from X and when they met for the second time travelling towards each other they were 10 km away from Y. Calculate the distance between X and Y (in km).

4

Rohit Kabasi 9y ago

35

Usha Putrevu 9y ago

explanation please..

Sunirmal 9y ago

35

karan sharma 9y ago

Let the distance be x.

S1 be Speed of A.

S2 be speed of B.


First time they meet, 

15/S1   =   [(x-15) / S2 ]


Second time they meet,

[(x+10)/S1] =   [(2x-10)/S2]


Divide both equations,

X=35


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