Question

Find the surface area of the cube shown below.

Answer 1

Answer:

37.5 or 37 1/2

Step-by-step explanation:

The formula for finding surface area in a cube is A=6a^2

substituting 2.5 instead of a will result in this equation. A=6(2.5)^2

solving algebraically will then get you to your answer of 37.5

Answer 2

Answer:

S.A. = 37.5

Step-by-step explanation:

Each cube has six faces. All faces are congruent and each of them is a square.

The fromula of an area of a square is:

$A=s^2$

s - length of a side of a square

We have

$s=2\dfrac{1}{2}$

Convert it to a decimal

$s=2\dfrac{1}{2}=2.5$

Substitute to the formula of an area of a square:

$A=(2.5)^2=(2.5)(2.5)=6.25$

The Surface Area of a cube:

$S.A.=6A$

Substitute:

$S.A.=6\cdot6.25=37.5$