As given,
ABCD is similar to JKLM. Therefore, the ratio of corresponding sides should be equal.
For example,
[tex]\frac{AD}{JM}=\frac{DC}{ML}[/tex]Now, put the values in the formula
[tex]\frac{6}{59}=\frac{3}{x}[/tex][tex]6\cdot x=3\cdot59[/tex][tex]6x=177[/tex][tex]x=\frac{177}{6}[/tex][tex]x=29.5[/tex]Therefore, option b) 29.5 is correct.