A point on level ground is 40 m from the foot of a vertical tower, and the angle of elevation of the top of the tower from this point is 60°. What is the straight-line distance from the point to the top of the tower?
Correct answer D. 80 m
Explanation
The line of sight is the hypotenuse, so cos 60° = 40 / line of sight, giving line of sight = 40 / (1/2) = 80 m.
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