At a point a, 20m above sea level of water in a lake, the angle of elevation of a cloud is 30°. The angle of depression of the reflection of the cloud in the lake is 60°. Find the distance of the cloud from a.

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The angle of elevation of a cloud from a point 60 m above a lake is $30^{\circ}$ and the angle of depression of the reflection of cloud in the lake is $60^{\circ}$ . Find the height of the cloud. [4 MARKS]

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