Hello Redhanya,
It.s not the right platform to ask such questions. This platform is dedicated for solving the hurdles students face in examinations counselling process, admissions etc. By the way the answer to your question is 20.83, you can do it by applying the basic concept of dipole moment and using it's formula.
Hope it helps
Question : If $\triangle A B C \sim \triangle F D E$ such that $A B=9 \mathrm{~cm}, A C=11 \mathrm{~cm}, D F=16 \mathrm{~cm}$ and $D E=12 \mathrm{~cm}$, then the length of $BC$ is:
Option 1: $5 \frac{3}{4} \mathrm{~cm}$
Option 2: $4\frac{3}{5} \mathrm{~cm}$
Option 3: $3\frac{5}{7} \mathrm{~cm}$
Option 4: $6\frac{3}{4} \mathrm{~cm}$
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