Answer
$30.625\text{m}$.
Work Step by Step
Familiarize- According to the provided statement,
$s=4.9{{t}^{2}}$
Translate- Substitute the value $t=2.5$ in the provided expression.
$s=4.9{{t}^{2}}$
Carry out- Substitute the value $t=2.5$ in the expression,
$\begin{align}
& s=4.9{{t}^{2}} \\
& =4.9{{\left( 2.5 \right)}^{2}} \\
& =30.625
\end{align}$
Thus, the cord length is $30.625\text{m}$.
