题目来源
题目来源1 : 2020年GRE数学新800题
正确率：60%
难度：5
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The figure shows part of the frame of an office building under construction, where points P, Q, and R are located on the frame at different heights and Q is 8.4 meters directly above P. The line of vision through Q and R makes an angle of 30 degrees with the upper horizontal floor, represented by line segment QS, and the line of vision through P and R makes an angle of 60 degrees with the lower horizontal floor, represented by line segment PT. What is the height of R, in meters, above the lower floor?
12.6 显示答案
以上解析由 考满分老师提供。
