question_answer 6)

Rita goes 20 km towards east from a point A to the point B. From B, she moves 30 km towards west along the same road. If the distance towards east is represented by positive integer then, how will you represent the distance travelled towards west? By which integer will you represent her final position from A?

Answer:

                The distance towards west \[=-\text{ 3}0\text{ km}\] Her final position from A \[=+\text{ 2}0\text{ km }+\left( -\text{3}0 \right)\text{ km}\] \[=-\left( \text{3}0-\text{2}0 \right)\text{ km}\] \[=-\text{1}0\text{ km}.\]