Answer:
170.3cm^2
Step-by-step explanation:
The total surface area is the sum of surfaces of all sides.
We have 2 sides of 7.9cmx4.5cm, 2 sides of 7.9cmx4cm, and 2 sides of 4.5cm*4cm.
7.9cm*4.5cm = 35.55cm^2
7.9cm*4cm = 31.6cm^2
4.5cm*4cm = 18cm^2
2 * (35.55cm^2 + 31.6cm^2 + 18cm^2) = 2 * 85.15cm^2 = 170.3cm^2
