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`        The angle of elevation of a cloud from a point 60m above a lake is 30degree and the angle of depression of the reflection of the cloud in the lake is 60degree. plz find the height of the cloud`
6 years ago

510 Points
```										let height of cloud is H from ground then height of cloud from point is (H-60) ...
using tan30 = (H-60)/d      .........1                (d is the base of upper triangle formed)

image of cloud after reflection is formed at H depth below the water surface , so for lower triangle
tan60 = (H + 60)/d          ...........2               (d is the base of lower triangle)
dividing 2 by 1
H+60/H-60 = 3
H + 60 = 3H - 180
2H = 240
H = 120m
```
6 years ago
Sudheesh Singanamalla
114 Points
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6 years ago
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