Cylinder - basics

Cylinder with base radius r = 54 cm and height h=35 cm. Calculate:

a) Area of the base

Correct answer:

S₁ =  9160.884 cm²
V =  320630.9462 cm³
o =  339.292 cm
S₂ =  11875.2202 cm²
S₃ =  30196.9886 cm²

Step-by-step explanation:

$$\begin{gathered} r=54\text{ cm } \\ h=35\text{ cm } \\ {S}_1=\pi \cdot r^2=3.1416\cdot 54^2=9160.884{\text{cm}}^2=9.16\cdot 10^3{\text{cm}}^2 \end{gathered}$$

$V=S_1\cdot h=9160.8842\cdot 35=320630.9462{\text{cm}}^3=3.206\cdot 10^5{\text{cm}}^3$

$o=2\pi \cdot r=2\cdot 3.1416\cdot 54=339.292\text{ cm}$

$S_2=o\cdot h=339.292\cdot 35=11875.2202{\text{cm}}^2=1.188\cdot 10^4{\text{cm}}^2$

$S_3=2\cdot S_1+S_2=2\cdot 9160.8842+11875.2202=30196.9886{\text{cm}}^2=3.020\cdot 10^4{\text{cm}}^2$

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