Non-woven 7322

A square sandpit should have a side length of 1.6 m. How long do you need a wooden board to enclose the sandpit? Under the sandbox, a non-woven fabric will extend by 0.2 m on each side. How much will we need?

Correct answer:

x =  1.8 m
S =  4 m²

Step-by-step explanation:

$$\begin{gathered} a=1.6\text{m} \\ {a}_1=0.2\text{m} \\ x=a+a_1=1.6+0.2=1.8\text{m} \end{gathered}$$

$S=(a+2\cdot a_1{)}^2=(1.6+2\cdot 0.2{)}^2=4{\text{m}}^2$

Try another example