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 \( 3.3 \).