Question

Integer used to represent walking $3$ km towards the north is

• A. walking $3$ km towards the south
• B. $-3$ km
• C. $+3$ km
• D. $+3$

Answer 1

The correct option is C $+3$ km

We know that moving $10$ m towards North is represented by $+10$ and also, $-10$ represents moving $10$ m towards South, which is opposite direction of North.

If a positive (+ve) integer indicates a particular direction; then the negative (-ve) integer indicates the opposite direction and vice versa.

Hence, from the above graph of directions we conclude that integer used to represent walking $3$ km towards the north is $+3$ km.