Question
Thu June 21, 2012 By:
Two cars A and B are moving along in a straight line. Car A is moving at a speed
of 80KMph while car B is moving at a speed 50KMph in the same direction, find

the following question in online test is right ?

Expert Reply
Thu June 21, 2012
Yes it is wrong why to use the negative sign when it is clearly specified that both the cars are moving in the same direction.
the correcty answer should be -30kmph
as relative velocity would be = velocity of B - velocity of A
= 50 - 80
= -30kmph
and direction opposite to the direction of their motion
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