To a person going east in a car at velocity of 25 kmph, a train appears to move towards north with a velocity of 253 kmph . The actual velocity train is
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a
25 kmph, 60° N of E
b
50 kmph, 30° S of W
c
25 kmph, 30° S of E
d
50 kmph, 60° N of E
answer is D.
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Detailed Solution
V¯Tm=V¯T−V¯m , V¯T=V¯Tm+V¯m , |V¯T|=V¯Tm 2+V¯m 2=50kmphtanθ=VTmVm=25325 , ∴θ=600 N of E