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A projectile is fired vertically upwards...

A projectile is fired vertically upwards from the surface of the earth with a velocity `Kv_(e)`, where `v_(e)` is the escape velocity and `Klt1`.If `R` is the radius of the earth, the maximum height to which it will rise measured from the centre of the earth will be (neglect air resistance)

A

`R/K`

B

`R/(K-1)`

C

`R/(1-K^(2)`

D

`R/(1+K^(2)`

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