Determine the surface area of the newly formed box. Two boxes each of dimensions (4 inches × 5 inches × 6 inches) are joined together face to face to make a rectangular prism box. Step 3: Add the areas of all six faces to determine the total surface area of the box.Ģ(lb + bh + lh) = 2lb + 2bh + 2lh = 720 + 600 + 960 = 2280 inch 2. The area of the bottom and the top surfaces are equal, therefore we can simply twice the area of the top or bottom of the box.Ģlb = 2 × (24 × 15) = 2 × 360 = 720 inch 2 Step 1: Determine the area of the top and bottom faces of the box. It can be calculated by following the steps given below: Solution: In this case, we have to find the total surface area of the box. Now that we know the formula and method to calculate the surface area of a rectangular prism, let us now understand how to calculate it with the help of an example.Įxample: Determine the minimum area of the wrapping paper required to wrap a rectangular gift box with dimensions as given below:
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