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QR= PQ + 5
RS= QR + 2= PQ + 7
PQ + PQ +5+ PQ +7 = 36
3PQ = 36-12
PQ = 24/3=8
QR= 13
RS= 15
P…….8…….Q………….13………..R…………15………..S
QS= 13 + 15= 28
17
34
46
39