In the diagram, points P,Q,R, and S are arranged in order on a line segment. If PQ=1,QR=2PQ and RS=3QR, then the length of PS is
Answer Choices
A. 7
B. 6
C. 9
D. 8
E. 10
In the diagram, points P,Q,R, and S are arranged in order on a line segment. If PQ=1,QR=2PQ and RS=3QR, then the length of PS is
Answer Choices
A. 7
B. 6
C. 9
D. 8
E. 10