Answer :

Since H varies directly as L, then we have

[tex]H\propto L[/tex]

This implies that

[tex]\begin{gathered} \frac{H_1}{L_1}=\frac{H_2}{L_2}=k, \\ \text{ where k is a constant} \end{gathered}[/tex]

Therefore,

[tex]H_2=\frac{H_1L_2}{L_1}[/tex]

In this case,

[tex]undefined[/tex]

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