Two trains A and B are moving with a velocity of 60 km/h and 40 km/h respectively towards north direction. What is the relative velocity of train B w.r.t. train A ?
(A) Zero (B)20 km/h towards south (C) 20 km/h towards north (D)100 km/h towards north
Answers
Given : Two trains A and B are moving with a velocity of 60 km/h and 40 km/h respectively towards north direction.
To Find : the relative velocity of train B w.r.t. train A
(A) Zero
(B)20 km/h towards south
(C) 20 km/h towards north
(D)100 km/h towards north
Solution:
Train A = 60 km/hr toward North
Train B = 40 km/hr toward North
relative velocity of train B w.r.t. train A
= Train B - Train A
= 40 km/hr toward North - 60 km/hr toward North
= - 20 km/hr toward North
= 20 km/hr toward South
Correct option is (B)20 km/h towards south
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