Question

Can someone help me

Answer 1

Answer:

it's d

Step-by-step explanation:

because you first do 3*4 =12 twice because there are two sides, and do 10*3 twice, and 10*4 twice, and add it all up.

so,

24+60+80=164

answer is d.

Answer 2

Answer:

Option D, $164\ units^2$

Step-by-step explanation:

Step 1:  Determine the area of the front and back

$A = l * w$

$A = 10\ units * 4\ units$

$A = 40\ units^2$

Step 2:  Determine the area of the sides

$A = l * w$

$A = 3\ units * 4\ units$

$A = 12\ units^2$

Step 3:  Determine the area of the top and bottom

$A = l * w$

$A = 10\ units * 3\ units$

$A = 30\ units^2$

Step 4:  Determine the total surface area

$SA = 2(40\ units^2) + 2( 12\ units^2) + 2(30\ units^2)$

$SA = 80\ units^2 + 24\ units^2 + 60\ units^2$

$SA = 164\ units^2$

Answer:  Option D, $164\ units^2$