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The initial speed of a shell is 140 m/s....

The initial speed of a shell is 140 m/s. At what angle must the gun be fined if the projectile is to strike a target at the same level as the gun? [The gun and the target are 1000 m apart]

A

`45^@`

B

`30^@`

C

`20^@`

D

`15^@`

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