luas kantor sebenarnya adalah?

Semoga membantu ya...

15/10 × 400 = 600 / 100 = 6 m
2 × 400 = 800 / 100 = 8 m
1 × 400 = 400 / 100 = 4 m

p = 6 + 6 + 8 + 4 + 4 = 28
l = 6 + 6 + 4 = 16

L = 28 × 16 = 448 m²

sorry ya kak kalau salah..