Question

Satpal walks `2/3 "km from a place P, towards the east and then from there"  1 5/7` km towards west. Where will he be now from P?

Answer 1

Let us denote the distance travelled towards the east by positive sign. So, the distances towards the west would be denoted by a negative sign.

Thus, distance of Satpal from the point P would be

`2/3 + (- 1 5/7)`

`=  2/3 + (-12)/7`

`= (2 xx 7)/(3 xx 7) + ((- 12) xx 3)/(7 xx 3)`

`= (14 - 36)/21`

`= (-22)/21`

`= - 1 1/21`

Since it is negative Satpal is at a distance `1 1/21` km towards west of P.