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I am Lyosha [343]
3 years ago
11

23 cm

Mathematics
1 answer:
Alenkasestr [34]3 years ago
5 0

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

A_{rectangle}=\text{length}\times\text{width}

So,

A_{rectangle}=23\times 6=138\ cm^2

The area of base is given as 15.6\ cm^2

Thus, the surface area is

SA=2A_{base}+3A_{lateral\ face}\\ \\SA=2\cdot 15.6+3\cdot 138=445.2\ cm^2

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