Barrel-shaped 40601

The barrel-shaped cylinder has a volume of 9.42 hl, the inner diameter of the bottom is 12 dm. Calculate the area of the barrel shell in m2. Solve in general first.

Correct answer:

S =  3.14 m2

Step-by-step explanation:

V=9.42 hl m3=9.42:10  m3=0.942 m3 D=12 dm m=12:10  m=1.2 m  r=D/2=1.2/2=53=0.6 m S1=π r2=3.1416 0.621.131 m2  V=S1 h  h=V/S1=0.942/1.1310.8329 m  S=π D h=3.1416 1.2 0.8329=3.14 m2

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