# Circular pool

The 3.6-meter pool has a depth of 90 cm. How many liters of water is in the pool?

Result

V =  9161 l

#### Solution:

$D=3.6 \ m=3.6 \cdot \ 10 \ dm=36 \ dm \ \\ h=90 \ cm=90 / 10 \ dm=9 \ dm \ \\ \ \\ r=D/2=36/2=18 \ \text{dm} \ \\ S=\pi \cdot \ r^2=3.1416 \cdot \ 18^2 \doteq 1017.876 \ \text{dm}^2 \ \\ 1l=dm^3 \ \\ V=S \cdot \ h=1017.876 \cdot \ 9 \doteq 9160.8842 \doteq 9161 \ \text{l}$

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