R is the midpoint of the segment ¯PT, and Q is the midpoint of line segment ¯PR. If S is a point between R and T such that the length of segment ¯¯¯¯¯¯¯¯QS is 10 and the length of segment ¯¯¯¯¯¯¯¯PS is 19, what is the length of segment ¯¯¯¯¯¯¯ST?
A
13
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B
14
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C
15
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D
16
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E
17
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Solution
The correct option is A17 Given that PR=RT and PQ=QR