# Fedor

Fedor stood in the small pool. Above the surface was a part of his body that was twice as long as part of his body underwater. What height does Fedor have, if his body part below the surface is 5 dm long?

Result

x =  15 dm

#### Solution:

$a=5 \ \\ b=2a=2 \cdot \ 5=10 \ \\ x=a+b=5+10=15 \ \text{dm}$

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