## Well, if we want to find the surface area of a rectangular prism, we need to add up the areas of all its sides. So, let's get calculating!

The formula for finding the surface area of a rectangular prism is:

Surface Area = 2lw + 2lh + 2wh

In this case, the width (w) is 4 cm, the length (l) is 5 cm, and the height (h) is 3 cm. So let's plug in those values:

Surface Area = 2(4)(5) + 2(4)(3) + 2(5)(3)

Now, let's calculate this mathematically:

Surface Area = 40 + 24 + 30

Adding it all up, we get:

Surface Area = 94 cmÂ²

So, the surface area of the rectangular prism with a width of 4 cm, a length of 5 cm, and a height of 3 cm is 94 cmÂ².