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A person goes from point L to M and come...

A person goes from point L to M and comes back. His average speed for the whole journey is 50 km/hr. If his speed while going from L to M is 35 km/hr, then what will be the speed of the person (in km/hr) while coming back from M to L?

A

`62.5`

B

75

C

`87.5`

D

`67.5`

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