Question 14 • Mathematics III
The support beam, floor, and vertical beam form a right triangle. The 28° angle is at the floor, so the vertical height of 1.6 meters is opposite that angle and the floor distance is adjacent. Using tan(28°) = 1.6 ÷ distance gives distance = 1.6 ÷ tan(28°) ≈ 3.0 meters. Thus, the lower end should be placed about 3.0 meters from the vertical beam, choice C.
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