b) \$ \\sin 30 ^ { \\circ } = \\frac { 11 } { h } \$

$b) \$ \\sin 30 ^ { \\circ } = \\frac { 11 } { h } \$$

b) \$ \sin 30 ^ { \circ } = \frac { 11 } { h } \$

We know that $\sin30^{\circ}=\frac{1}{2}$. So the equation becomes $\frac{1}{2}=\frac{11}{h}$.

Cross - multiply: $h\times1 = 11\times2$.

$h = 22$