Tiles

It is given an area of 5m x 4m. One tile is 40 x 40 cm. How many tiles are needed in an area of 5 m x 4 m?
And how many tiles need to be cut (if the tiles can't fall exactly)?

Correct answer:

n =  125
x =  5

Step-by-step explanation:

$$\begin{gathered} n_1=500/40=\frac{25}{2}=12\frac{1}{2}=12.5 \\ {n}_2=400/40=10 \\ x=n_2/2=10/2=5 \\ n=n_1\cdot n_2=12.5\cdot 10=125 \end{gathered}$$

$x=5$

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