c:1,8=11:6

To solve the equation \( c:1.8 = 11:6 \), we can express it as a proportion. This means we can write it as:

\[ \frac{c}{1.8} = \frac{11}{6} \]

Now, to find \( c \), we can cross-multiply:

\[ c \cdot 6 = 1.8 \cdot 11 \]

Calculating \( 1.8 \cdot 11 \):

\[ 1.8 \cdot 11 = 19.8 \]

Now, we have:

\[ 6c = 19.8 \]

Next, divide both sides by 6:

\[ c = \frac{19.8}{6} = 3.3 \]

So, the value of \( c \) is \( 3.3 \).