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A boy playing on the roof of a 10 m high...

A boy playing on the roof of a 10 m high building throws a ball with a speed of 10 m/s at an angle ` 30 ^@ ` with the horizontal. How far from the throwing point will the ball be at the height of 10 m from the ground?
` (g = 10 m//s ^ 2 ) `

A

5.20 m

B

4.33 m

C

2.60 m

D

8.66 m

Text Solution

Verified by Experts

The correct Answer is:
D
From the figure it is clear that range is required
`R=(u^2 sin 2 theta)/g`
`=((10)^2 sin (2xx30^@))/10 = 5sqrt3`
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