Question

7. Raj builds a side table in the shape of a cube. Each edge of the cube

measures 20 inches. Raj wants to cover the top and four sides of the table
with ceramic tiles. Each tile has an edge length of 5 inches. How many
tiles will he need?

Answer 1

80 tiles

Explanation:

20/5 = 4

For one side: 4×4 = 16 tiles are needed

For 5 sides: 5 × 16 = 80 tiles are needed

Answer 2

80 tiles

Explanation:

A cube has 6 sides, but for this cube, we only want to cover 5 of them.

We want to find the surface area of the 5 sides of the cube. This is denoted by the formula: A =
`5s^2` , where s is the side length. Each edge of the cube is 20 inches. So, s = 20, and: A = 5 *
`20^2` = 5 * 400 = 2000 inches squared.

Now, we have square tiles, each with edge length 5. So, the area that each tile will cover is 5 * 5 = 25 inches squared.

To find how many tiles can cover 2000 inches squared of floor, we divide 2000 by 25:

2000/25 = 80

So, the answer is 80 tiles.

Hope this helps!