I don’t understand what to do

Mathematics

1 answer:

denis23 [38]3 years ago

3 0

Find the S.A of all the cubes and then add them together.

S.A = 6a²

a is the side length

S.A = 6(3)² = 54
S.A = 6(2)² = 24
S.A = 6(1)² = 6

Now add them all together.

54 + 24 + 6 = 84

So the total surface area is 84

Hope this helps :)

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EXPLANATION

Given information

The perimeter of a rectangle field is 372 yards

The width of the field is 87 yards

To find the length of the rectangular field, follow the steps below

Step 1: Write the formula for finding the perimeter of a rectangular field

$\begin{gathered} \text{ The perimeter of a rectangular field = 2\lparen l + w\rparen} \\ \text{ where l =length, and w = width} \end{gathered}$

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$\begin{gathered} \text{ Perimeter = 2 \lparen l + w\rparen} \\ \text{ Perimeter = 372 yards} \\ \text{ width = 87 yards} \\ \text{ 372 = 2\lparen l + 87\rparen} \\ \text{ Divide both sides by 2} \\ \text{ }\frac{372}{2}\text{ = }\frac{2}{2}(l\text{ + 87\rparen} \\ 186\text{ = l + 87} \\ \text{ subtract 87 from each sides of the equation} \\ \text{ 186 - 87 = l + 87 - 87} \\ \text{ 99 = l} \\ l\text{ = 99 yards} \end{gathered}$

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PLEASE HURRRY!!!! WILL GIVE BRAINLIEST

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