The perimeter 3

The perimeter of a rectangle is 35 cm. The ratio of the length to its width is 3:2. Calculate the dimensions of the rectangle

Correct answer:

l =  10.5 cm
w =  7 cm

Step-by-step explanation:

$$\begin{gathered} p=35\text{ cm } \\ n=3+2+3+2=10 \\ d=p\mathrm{/}n=35\mathrm{/}10={\displaystyle \frac{7}{2}}=3.5\text{ cm } \\ l=3\cdot d=3\cdot 3.5={\displaystyle \frac{21}{2}}={\displaystyle \frac{21}{2}}\text{ cm}=10.5\text{ cm} \end{gathered}$$

$w=2\cdot d=2\cdot 3.5=7\text{ cm}$

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