Tolong di jawab yaaa

48 : 3 = 16

K 3 kotak = 4 x 16 x 3 = 192 cm
K yg diarsir = 4 x 16 x 6 = 384 cm

Jadi 384 – 192 = 192 cm

Maaf kalo slah

L = 1/2 x a x t
   = 1/2 x 45 x 12
   = 540cm^2

maaf kalau salah