Question

ΔABC ~ ΔPQR, AB = 6, BC = 4, AC = 8, PR = 6 if PQ + QR = .......

Answer 1

where is your figure

Answer 2

Gn that

Two traingles are Similar
therefore corresponding sides are proportional

ie
$\frac{ ab}{pq} = \frac{ac}{pr} = \frac{bc}{qr}$
ie

$\frac{6}{pq} = \frac{4}{qr} = \frac{8}{6}$
ie

$\frac{6}{pq} = \frac{4}{qr} = \frac{4}{3}$
I and III ratios= pq=4.5cm

II and III ratios = qr=3cm


Hence

PQ+QR=4.5+3=7.5cm