Question

If $A:B=5:7$ and $B:C=6:11,$ then $A:B:C$ is

• A. $55:77:66$
• B. $30:42:77$
• C. $35:49:42$
• D. None of these

Answer 1

The correct option is B $30:42:77$

$A:B=5:7,B:C=6:11$
$(6\times \frac{7}{6}):(11\times \frac{7}{6})=7:\frac{77}{6}$
$\therefore$ $A:B:C=5:7$ $\frac{77}{6}$ =

$30:42:77$