Answer:
7 m
Step-by-step explanation:
Corresponding sides of similar triangles are in same ratio.
[tex]\dfrac{QR}{SR}=\dfrac{QP}{ST}\\\\\dfrac{y}{8}=\dfrac{3}{6}\\\\y=\dfrac{3}{6}*8\\\\y=4\\\\\\[/tex]
[tex]\dfrac{x}{1.5}=\dfrac{6}{3}\\\\x =\dfrac{6}{3}*1.5\\\\x=3[/tex]
x + y = 3 + 4 = 7
