Cylinder

The 1.8m cylinder contains 2000 liters of water. What area (in dm2) of this container is the water?

Correct result:

S =  698.9134 dm2

Solution:

D=1.8 m→ dm=1.8⋅ 10  dm=18 dm r=D/2=18/2=9 dm  V=2000 l→ dm3=2000⋅ 1  dm3=2000 dm3  S1=π⋅ r2=3.1416⋅ 92≐254.469 dm2  h=V/S1=2000/254.469≐7.8595 dm  S=S1+π⋅ D⋅ h=254.469+3.1416⋅ 18⋅ 7.8595=698.9134 dm2

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