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The height of a tower is measured by a mirror on the ground at \(R\) by which the top of the tower's reflection is seen. Find the height of the tower, if \(\triangle PQR \sim \triangle STR\).
 
YCIND_230118_4962_TN_GEO8_ST_1.png
 
Answer:
 
The height of the tower is  \(ft\).