\[\boxed{\mathbf{216}\mathbf{.}}\]
\[MP = 32\ см;\]
\[MK = 24\ см;\]
\[NP = 18\ см;\]
\[KP = MP - MK = 32 - 24 =\]
\[= 8\ см.\]
\[NK = NP - KP = 18 - 8 =\]
\[= 10\ см.\]
\[Ответ:10\ см.\]