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A ball is projected at an angle 60^(@) w...

A ball is projected at an angle `60^(@)` with the horizontal with speed 30 m/s. What will be the speed of the ball when it makes an angle `45^(@)` with the horizontal ?

A

30 m/s

B

`15sqrt2m//s`

C

`(15)/(sqrt2)m//s`

D

`30sqrt2m//s`

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The correct Answer is:
B
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