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One observer estimates the angle of elev...

One observer estimates the angle of elevation to the basket of a hot air ballon to be `60^@`, while another observer 100m away estimates the angle of elevation to be `30^@`. Find
(a) The height of the basket from the ground.
(b) The distance of the basket from the first observer's eye.
(c) The horizontal distance of the second observer from the basket

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