Cylindrical 38791

The cylindrical barrel is 1.2 m high, and the diameter of its base is 0.6 m. How many hectoliters of water will fit in the barrel? What is the smallest amount of sheet metal needed for its production? (we count both bases)

Correct answer:

V =  3.3929 hl
S =  2.8274 m2

Step-by-step explanation:

h=1.2 m D=0.6 m  r=D/2=0.6/2=103=0.3 m  S1=π r2=3.1416 0.320.2827 m2 V1=S1 h=0.2827 1.20.3393 m3  V=V1 hl=V1 10  hl=0.3393 10  hl=3.393 hl=3.3929 hl
S=2 S1+2π r h=2 0.2827+2 3.1416 0.3 1.2=2.8274 m2

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