Do not copy cheg....In a standard vertical short tube evaporator, if the diameter of the tube is $0\mathrm{.}05$ m and the height is $1\mathrm{.}5$ m$,$ what is the length$-$to$-$diameter ratio?

$-$ a$)15$

$-$ b$)30$

$-$ c$)20$

$-$ d$)10$