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Question

# A man walked 5 km towards North then 8 km towards South. What is his final position with respect to his initial position?

A

4 units

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B

-4 units

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C

-3 units

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D

1 unit

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Solution

## The correct option is C -3 units The north direction can be taken as positive and south as negative. Then walking 5 km towards north can be taken as +5 units. Walking 8 km towards south can be taken as -8 units. The final position = +5 - 8 = -3 units. Here, the '-' sign shows that he is in south direction with respect to his initial position. ⇒ The man's final position is 3 units to the south with respect to his initial position.

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