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 answer:

x =  8400 Kc
y =  300 Kc

Step-by-step explanation:

c=350 Kc/m2 a=4 m b=6 m S=a b=4 6=24 m2  x=c S=350 24=8400 Kc
l=15 Kc/m o=2 (a+b)=2 (4+6)=20 m  y=l o=15 20=300 Kc

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