Mohan was facing East. He walked 4 km forward and then after turning to his right walked 3 km. Again he turned to his right and walked 4 km. After this he turned back. Which direction was he facing at that time?

East

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West

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North

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South

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Solution

The correct option is B East
Let us consider a Cartesian plane thinking positive $X -$ axis as East; negative one as West; positive $Y -$ axis as North; negative as South.
Mohan walks along positive $X -$ axis $4 k m$ later he walks parallel to negative $Y -$ axis $3 k m$ .
Finally, he moves parallel to $X -$ axis $4 k m$ in negative direction and turns back.
Hence, he is still parallel to $X -$ axis but as he is in opposite direction, he faces positive side which is nothing but East.
option A

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