Rita goes 20 kilometres towards east from point a to b from b she moves 30 kilometres towards west along with the same road is the distance towards east is represented by a positive integer then how will you represent the distance travel towards west by which integer will you represent her final position from a .
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From "a" to "b" = 20km
she moves towards the west 30 km along the same road ...i.e. she moves back 30 km along the same path and cross away from point "a" ...let's take the final position denoted by a point c ...& we have the distance between the points "a" and "c" is 10 km ...
since, ab+ ac= bc
(20+ ac) km= 30 km
=> ac = (30-20)km
=> ac = 10 km
...thank you...
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