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An electric cable cost Rs 200.If the cable was 5m longer and each metre of cable costs Rs 2 less,the cost of cable would have remained unchanged.Represent the above situation in the form of a quadratic equation


Let the length of the cable be a
total cost of the cable=200
cost of each metre=200/a
if length=a+5 and cost of each metre=200/a-2
then total cost=200

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