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At t=0 a projectile is fired from a poin...

At `t=0` a projectile is fired from a point `O` (taken as origin) on the ground wita speed of `50m//s` at an angle of `53^(@)` with the horizontal. It just passes two points `A` and `B` each at height `75m` above horizontal.

The horizontal separation between the points `A` and `B`

A

`60sqrt(2)`

B

`100`

C

60

D

120

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