1.

Ram Shyam are walking on two perpendicular tracks with speed `3ms^(-1)` and `4 ms^(-1)`, respectively. At a certain moment `(say t = 0s)`, Ram and Shyam are at 20 m and 40 m away from the intersection of tracks, respectively, and moving towards the intersection of the tracks. During the motion the magnitude of velocity of ram with respect to Shyam isA. `1ms^(-1)`B. `4ms^(-1)`C. `5ms^(-1)`D. `7ms^(-1)`

Answer» `V_(R//S)=sqrt(3^(2)+4^(2))=5`


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