Answer:
p : r = 5 : 2
Step-by-step explanation:
Expressing the ratios in fractional form, then
[tex]\frac{p}{r}[/tex] = [tex]\frac{p}{a}[/tex] × [tex]\frac{a}{b}[/tex] × [tex]\frac{b}{c}[/tex] × [tex]\frac{c}{r}[/tex]
= [tex]\frac{1}{2}[/tex] × [tex]\frac{2}{3}[/tex] × [tex]\frac{5}{1}[/tex] × [tex]\frac{3}{2}[/tex]
= [tex]\frac{30}{12}[/tex]
= [tex]\frac{5}{2}[/tex]
Thus ratio p : r = 5 : 2
