Question

Does anyone know the answer and how to get the answer ?

Answer 1

Answer:

3. $384\ square\ inches$

Step-by-step explanation:

To solve this, find the areas of the smaller geometric shapes and add them together.

1. Rectangle (top)

$A_1 = lw = 20 * 5 = 100$

2. Rectangle (middle)

$A_2 = lw = 20 * 8 = 160$

3. Rectangle (bottom)

$A_3 = lw = 20 * 5 = 100$

4. Triangle (left)

$A_4 = \frac{bh}{2} = \frac{8*3}{2} = \frac{24}{2} = 12$

4. Triangle (right)

$A_5 = \frac{bh}{2} = \frac{8*3}{2} = \frac{24}{2} = 12$

Add the areas together for the total surface area.

$A_t = 100 + 160 + 100 + 12 + 12 = 384$