Table of Contents

## How do you calculate surface area of a box?

Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape. A cuboid has 6 rectangular faces. To find the surface area of a cuboid, add the areas of all 6 faces. We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.

## What is the lateral surface area of a rectangle?

The formula for the lateral surface area of a rectangular box, also called a cuboid, is 2h(l + w), where l = length, w = width, and h = height.

**How do you find the square Metre of a box?**

Multiply the length and width together. Once both measurements are converted into metres, multiply them together to get the measurement of the area in square metres. Use a calculator if necessary.

**How to calculate the surface area of a box?**

Surface area of a box. The surface area formula for a rectangular box is 2 x (height x width + width x length + height x length), as seen in the figure below: Since a rectangular box or tank has opposite sides which are equal, we calculate each unique side’s area, then add them up together, and finally multiply by two to get the total surface area.

### How to calculate the surface area of a tank?

The surface area formula for a rectangular box is 2 x (height x width + width x length + height x length), as seen in the figure below: Since a rectangular box or tank has opposite sides which are equal, we calculate each unique side’s area, then add them up together, and finally multiply by two to get the total surface area.

### How do you measure the width of a box?

Measure the width of the box. This is the side directly perpendicular (it forms a right angle, or L) with the length. Make sure you are not remeasuring the height. Example: The width of the box is 2 feet. Ensure that you didn’t measure the same side twice. The easiest way to prevent this is to check that all three lines meet at some point.

**How to find the surface area of a rectangular solid?**

In general, to find the surface area of a rectangular solid, remember that each face is a rectangle, so its area is the product of its length and its width (see Figure 9.31 ). Find the area of each face that you see and then multiply each area by two to account for the face on the opposite side.