Question

What is the surface of the prism ​

Answer 1

The third answer is correct

Explanation:

Given:

A net of a rectangular prism

l (length) = 11,75 cm

w (width) = 5,75 cm

h (height) = 4 cm

Find: A (surface area) - ?

The surface area is equal to the sum of the areas of all the sides

There are:

2 sides with dimensions of 11,75 cm and 4 cm

2 sides with dimensions of 5,75 cm and 11,75 cm

2 sides with dimensions of 4 cm and 5,75 cm

`a(surface) = 4 * 11.75 * 2 + 5.75 * 11.75 * 2 + 4 * 5.75 * 2 = 275.125 = 275 (1)/(8) \: {cm}^(2)`