Since the length of the box is twice the width and the height is three times the width,  and . 

The surface area of the box is

To find the width:

To find the surface area of a prism, the problem can be approached in one of two ways.

1. Through an equation that uses lateral area
2. Through finding the area of each side and taking the sum of all the faces

Using the second method, it's helpful to realize rectangular prisms contain  faces. With that, it's helpful to understand that there are  pairs of sides. That is, there are two faces with the same dimensions. Therefore, we really only have three sides for which we need to calculate areas: 

Faces 1 & 2:

Faces 3 & 4:

Faces 5 & 6:

Now, we can add up the areas of all six sides:

The surface area is .

Since the ramp forms a 45-45-90 triangle, the base of the ramp is equal to the height. So the area of the triangle is  meters. The area of the two triangles would be  meters. The other sides of the ramp are rectangles. Two of the rectangles are the same with one having a different length due to the hypotenuse of the triangle. The two that are the same have a length of 3 and a width of 8. The area for each of these is  meters. Since there are 2 of these, we mulitply 24 by 2. For the last triangle, we must find the hypotenuse of the triangle. Since it is a 45-45-90, the hypotenuse is the base multiplied by . Therefore the last rectangle's is  meters. The find the surface area, all of the areas must be added together. Triangles+rectangles= meters. To the nearest whole meter, the answer is 91 meters.

Since the box has an open top, the surface area is calculated by finding the four sides plus the floor of the box.

The short sides' areas are calculated by multiplying height times width times two, for the two sides: .

The longer sides' areas are calculated by multiplying height times length times two, for the two sides: .

Now, we calculate the area of the floor of the box by multiplying length times width times one, for the only floor and no top: .

Lastly, we add the areas together to calculate the total surface area of the open-top box: ,

Surface area means the entire area that all the sides of a prism take up. 

The surface area can be calculated in one of two ways. One way involves using an equation for lateral area. The other method involves taking the area of all the sides and summing the areas. 

Using the latter of the two methods:

It's helpful to understand that rectangular prisms have three pairs of sides with the same dimensions, making up the total of six faces. This means that only three novel calculations for individual areas of faces need to be calculated. 

Faces 1 & 2:

Faces 3 & 4:

Faces 5 & 6:

To find the surface area of the rectangular box we just need to add up the areas of all six sides. We know that two of the sides are 36 square centimeters, that means we need to find the areas of the four mising sides. To find the area of the missing sides we can just multiply the side of one of the squares (6 cm) by the width of the box:

But remember we have four of these rectangular sides:

Now we just add the two square sides and four rectangular sides to find the total surface area of the jewelry box:

That is the total surface area!

The surface area of a rectangular prism is given by

 where is the length, is the width, and is the height.

Let , , and 

So the equation to solve becomes  or 

However the question asks for an answer in square feet.  Knowing that  we can convert square inches to square feet.  It will take  of paper to wrap the present.

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

Now, since we have two hexagons, we can multiply the area by  to get the area of both bases.

Next, this prism has  rectangles that make up its sides.

Recall how to find the area of a rectangle:

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by  to find the total area of all of the sides of the prism.

Add together the area of the sides and of the bases to find the surface area of the prism.

Plug in the given values to find the surface area of the prism.

Make sure to round to  places after the decimal.

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

Now, since we have two hexagons, we can multiply the area by  to get the area of both bases.

Next, this prism has  rectangles that make up its sides.

Recall how to find the area of a rectangle:

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by  to find the total area of all of the sides of the prism.

Add together the area of the sides and of the bases to find the surface area of the prism.

Plug in the given values to find the surface area of the prism.

Make sure to round to  places after the decimal.

In order to find the surface area, you will need to add up the areas of each face of the prism.

This hexagonal prism has two regular hexagons as its bases.

Recall how to find the area of a regular hexagon:

Now, since we have two hexagons, we can multiply the area by  to get the area of both bases.

Next, this prism has  rectangles that make up its sides.

Recall how to find the area of a rectangle:

In this prism, the length is also the side of the hexagon, and the width of the rectangle is the height of the prism.

Now, multiply the area of the rectangle by  to find the total area of all of the sides of the prism.

Add together the area of the sides and of the bases to find the surface area of the prism.

Plug in the given values to find the surface area of the prism.

Make sure to round to  places after the decimal.