Original 9251

If the length of the square pad tent is reduced by 6 cm, its area will be reduced by 2.76 dm². Specify the side length of the original and reduced pads.

Correct answer:

a =  26 cm
b =  20 cm

Step-by-step explanation:

$$\begin{gathered} (a-6{)}^2=a^2-2.76\cdot 100 \\ 12a=312 \\ 12\cdot a=312 \\ 12a=312 \\ a=\frac{312}{12}=26 \\ a=26=26\text{cm} \end{gathered}$$

$b=a-6=26-6=20\text{cm}$

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