A piece of wallpaper is 12 m long and 5 dm wide. What area can be pasted over with 10 such pieces?

First of all, let’s determine the area of one piece of wallpaper, the length of which is 12 m, and the width = 5 dm (0.5 m, assuming that 1 m = 10 dm).

The area of the rectangle is calculated by the formula:

S = a * b.

Substitute the known values:

S = 12 * 0.5 = 6 m².

Ten such pieces can be pasted over:

10 * 6 = 60 m².

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