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Person A observes B moving in east direc...

Person A observes B moving in east direction with speed `10(m)/(s)`, B observes C moving in south direction with speed `20(m)/(s)`, C observes D moving in west direction with speed `30(m)/(s)` & D observes a tree moving with speed `40(m)/(s)` in north direction. Then the actual direction of motion of person `A` will be

A

north`-`west

B

north`-`east

C

south`-`east

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
All the velocities are marked in diagram where `G` represents ground

addint we get

Then `vec(V)_(GD)+vec(V)_(DC)+vec(V)_(CB)+vec(V)_(BA)=vec(V)_(GA)=-vec(V)_(AG)`
Hence velocity of `A` is towards south east.
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