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A car moves a distance of 200 m. It cove...

A car moves a distance of `200 m`. It covers the first-half of the distance at speed `40km//h` and the second-half of distance at speed `v km//h`. The average speed is `48km//h`. Find the value of v.

A

`56km//h`

B

`60km//h`

C

`50km//h`

D

`48km//h`

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