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We have, Distance towards the east is represented by positive whereas distance towards the west is represented by a negative integer

It is given in the question that,

Distance traveled in the east direction = 20 km

Also,

Distance traveled in west direction = 30 km

Therefore,

Distance travelled from A = 20 + (-30)

= - 10 km

As the distance is negative, so we will represent the distance travelled by Rita from A towards the west direction.

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