Rubberized 19963

The circular pool with a diameter of 3.5 m is covered with a circular tarpaulin made of rubberized fabric for CZK 110 per square meter. Determine how much the tarpaulin cost if you know that its radius is 25 cm larger than the radius of the pool.

Correct answer:

x =  1382.3 Kc

Step-by-step explanation:

$$\begin{gathered} D=3.5\text{m} \\ c=110{\text{kc/m}}^2 \\ h=25\text{cm}\to \text{m}=25:100\text{m}=0.25\text{m} \\ r=D/2+h=3.5/2+0.25=2\text{m} \\ S=\pi \cdot r^2=3.1416\cdot 2^2\doteq 12.5664{\text{m}}^2 \\ x=c\cdot S=110\cdot 12.5664=1382.3\text{Kc} \end{gathered}$$

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