Răspuns: 52 cm
Explicație pas cu pas:
Cuboidul are 12 muchii
4 lungimi,
4 latimi
4 inaltimi
Suma muchiilor = 4 x ( L + l + h)
2 intreg 1/3 = (2 x 3 + 1) / 3 = 7/3
6 intreg 2/3 = (6 x 3 + 2) / 3 = 20/3
S = 4 x (4 + 7/3 + 20/3)
S = 4 x (4 + 27/3)
S = 4 x (4 + 9)
S = 4 x 13
S = 52 cm
#copaceibrainly
