Question

find the missing dimension in the figure with the given surface area .
please help because tomorrow is my exam​

Answer 1

Answer:

4 cm

Step-by-step explanation:

see in the attachment.

Answer 2

Answer:

Length of the cuboid is 4cm

Step-by-step explanation:

256 = 2[(L × 12) + (5 ×12) + (L × 5)]

.•. 128 = 12L + 60 + 5L

.•. 68 = 17L

.•. 4cm = L