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A train travels a distance of 480 km at ...

A train travels a distance of 480 km at a uniform speed. If the speed had been 8 km/hr more, then it would have taken 2 hours less to cover the same distance. The quadratic equation in terms of speed "x" is

A

`x^(2) + 8x + 480 = 0`

B

`x^(2) - x + 200 = 0`

C

`x^(2) - x + 200 =0`

D

`x^(2) + 8x - 480 = 0`

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