A 9 meter long ladder rests at 9 metre below a vertical wall. If the angel of elevation of top of the wall from the foot of ladder is 60°.find the height of the wall
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7.79 m
Step-by-step explanation:
The ladder, the ground and the wall will form a right angle triangle.
What we know:
Hypotenuse = length of the ladder = 9m
Angle of elevation = 60°
Find the height of the wall:
sin θ = opp/hyp
sin (60) = height/9
height = 9 x sin (60)
height = (9√3)/2 or 7.79 m
Answer: 7.79 m
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