# Ratio - rectangle

The rectangle has dimensions 6 cm and 9 cm. How many times increases area and its perimeter, when its dimensions increase in the ratio 5:3?

Correct result:

k(S) =  2.78
k(o) =  1.67

#### Solution:

$k\left(S\right)=\left(5\mathrm{/}3{\right)}^{2}=2.78$
$k\left(o\right)=5\mathrm{/}3=1.67$

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