Question

Mohit travelled in a bus towards east of a Delhi by 49 km and then towards west of Delhi by 80km .How far was he from Delhi?​

Answer 1

First he goes towards east to 49 km.

$\sf{\underline{And\:then:}}$

Gets back in opposite direction that is 80 km.

$\sf{\underline{Means:}}$ 80 km West.

$\sf{\underline{Here:}}$

$\implies$ 49 km East

$\implies$ -80 km West

$\sf{\underline{Note:}}$ '-ve' sign indicates opposite direction.

Total distance from starting point:

$\sf{\underline{That\:is:}}$

By adding we get:

$\implies$ 49 + (-80)

$\implies$ -31

$\sf{\underline{Therefore:}}$

31 km towards west of Delhi.