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If the angles of elevation of a ballon f...

If the angles of elevation of a ballon from the two consecultive kilometre stones along a road are `30^@` and `60^@` respectively, then the height of the balloon above the ground will be

A

`(sqrt(3))/(2)` km

B

`(1)/(2)` km

C

`(2)/(sqrt(3))` km

D

`3sqrt(3)` km

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The correct Answer is:
A
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