Answer
$\mathrm{COP}_{\mathrm{R}}=1200 W$
Work Step by Step
The required power input is determined from the definition of $\mathrm{COP}_{\mathrm{R}}$, $$
\mathrm{COP}_{\mathrm{R}}=\frac{\dot{Q}_L}{\dot{W}_{\text {in }}} \longrightarrow \dot{W}_{\text {in }}=\frac{\dot{Q}_L}{\mathrm{COP}_{\mathrm{R}}}=\frac{180 \mathrm{~W}}{0.15}=1200 \mathrm{~W}
$$
