Correct Answer: Option A

Explanation

\(\frac{\text{t}}{t + 4}\) = \(\frac{7}{7 + 5}\)

\(\frac{\text{t}}{t + 4}\) = \(\frac{7}{12}\)

12t = 7t + 28

12t - 7t = 28

5t = 28

t = \(\frac{28}{5}\) = 5.6cm

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