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Problems Involving Difference of Positive and Negative Numbers

A car travell...

Question

A car travelled 60 km towards the north direction from a point A. From there, it travelled 100 km in the south direction. How far is the car from point A now?

A

40 km South

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B

40 km North

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C

160 km South

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D

160 km North

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Solution

The correct option is A
40 km South

Let's assume a car travelling toward North as positive and South as negative.

+60 + (- 100) = - 40. The car is 40 km South from point A.

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