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A shell fired from the ground is just ab...

A shell fired from the ground is just able to cross in a horizontal direction the top of a wall 90m away and 45m high. The direction of projection of the shell will be:

A

`25^(@)`

B

`30^(@)`

C

`60^(@)`

D

`45^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D
`h=(u^(2)sin^(2) theta)/(2g) and R=(u^(2)sin2 theta)/g`
`45/180=1/4 tan theta or theta=45^(@)`
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