A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of 600 with the wall, then find the height of the wall.
Given: length of ladder = 15 m
Angle between the ladder and the top of the wall = 60°
We have to find the height of the wall, h.
In 
Thus, the height of the wall is 7.5 m.
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