211 — 213, 217 — 218

P = 40
BC = x
AD = 4x

2y + 5x = 40

5x = 2y

2y + 2y = 40

4y = 40

y = 40/4 = 10

40 — (10 + 10) = 20

20 : 5 = 4

BC = 4

AD = 4x = 4 * 4 = 16