Answer:
445.2 square cm
Step-by-step explanation:
The surface area consists of area of two bases and area of three leteral faces. Each lateral face is a rectangle with length of 23 cm and width of 6 cm.
The area of rectangle is
[tex]A_{rectangle}=\text{length}\times\text{width}[/tex]
So,
[tex]A_{rectangle}=23\times 6=138\ cm^2[/tex]
The area of base is given as [tex]15.6\ cm^2[/tex]
Thus, the surface area is
[tex]SA=2A_{base}+3A_{lateral\ face}\\ \\SA=2\cdot 15.6+3\cdot 138=445.2\ cm^2[/tex]
