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A spherical ballon of radius r subtends ...

A spherical ballon of radius r subtends angle `60^(@)` at the eye of an observer. If the angle of elevation of its centre is `60^(@)` and h is the height of the centre of the ballon, then which one of the following is correct ?

A

`h=r`

B

`h=sqrt(2)r`

C

`h=sqrt(3)r`

D

`h=2r`

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