Traffic cones

Forty identical traffic cones with a base diameter d = 3 dm and a height v = 6 dm should be painted on the outside with orange paint (without base). How many crowns do we pay for color? If we need 50 cm ^ 3 of paint to paint, 1m2 and 1l of paint costs CZK 80?

Correct answer:

x =  46.6312 Kc

Step-by-step explanation:

d=3 dm r=d/2=3/2=32=1.5 dm v=6 dm  s=v2+r2=62+1.526.1847 dm S1=π r s=3.1416 1.5 6.184729.1445 dm2 S2=1 m2 dm2=1 100  dm2=100 dm2  n=40 1 l=1 dm3 c=80 kc/dm3 V1=50 cm3 dm3=50/1000  dm3=0.05 dm3  k=c V1/S2=80 0.05/100=125=0.04 Kc/dm2  x=n S1 k=40 29.1445 0.04=46.6312 Kc

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