Answer :

luana
[tex]\frac{24}{21}=\frac{s}{35}\\\\24\cdot35=21s\\\\21s=840\ \ \ \ \ \ \ |:21\\\\\boxed{s=40}[/tex]
naǫ
[tex]\frac{24}{21}=\frac{s}{35} \\ \frac{8}{7}=\frac{s}{35} \\ 35 \times \frac{8}{7}=s \\ 5 \times 8=s \\ s=40 [/tex]

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