tolong jawab no. 30 pake cara makasihh

[tex] \frac{ < cod}{ < aob} = \frac{juring \: ocd}{juring \: oab} \\ \frac{72}{108} = \frac{42}{x} \\ \frac{2}{3} = \frac{42}{x} \\ x = \frac{42 \times 3}{2} \\ x = 63[/tex]
jwbnnya C. 63
#maaf klo salah yaaa