Napkin ribbon

Petra invited her friends Olga and Pavel to sew. Olga sewed three tablecloths, Pavel two, and Petra five rectangular napkins measuring 39 times 30 cm. Was it enough for them to decorate 15 meters of ribbon?

Result

x=

Yes

No

Step-by-step explanation:

$$\begin{gathered} o=2\cdot (39+30)/100=\frac{69}{50}=1\frac{19}{50}=1.38\text{m} \\ p=(3+2+5)\cdot o=(3+2+5)\cdot 1.38=\frac{69}{5}=13\frac{4}{5}=13.8\text{m} \\ p<15m \\ x=1 \end{gathered}$$

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