Carpet

How many crowns CZK do we pay for a carpet for a bedroom, when 1m of square carpet costs 350 CZK and the bedroom has dimensions of 4m and 6m? How many crowns do we pay for a strip around the carpet, when 1m of the strip costs 15 CZK?

Correct result:

x =  8400 kc
y =  300 Kc

Solution:

$$\begin{gathered} c=350{\text{Kc/m}}^2 \\ a=4\text{ m } \\ b=6\text{ m } \\ S=a\cdot b=4\cdot 6=24{\text{m}}^2 \\ x=c\cdot S=350\cdot 24=8400\text{ kc} \end{gathered}$$

$$\begin{gathered} l=15\text{ Kc/m } \\ o=2\cdot (a+b)=2\cdot (4+6)=20\text{ m } \\ y=l\cdot o=15\cdot 20=300\text{ Kc} \end{gathered}$$

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