Material 7608

The inner radius of the oven is r1 = 15cm, the outer radius is r2 = 20cm, and the length is 227cm. Can one person take it if its material density is 2.8 g / cm cubic?

Correct answer:

m =  349.4394 kg

Step-by-step explanation:

$$\begin{gathered} r_1=15\text{cm} \\ {r}_2=20\text{cm} \\ v=227\text{cm} \\ h=2.8{\text{g/cm}}^3 \\ S=\pi \cdot r_2^2-\pi \cdot r_1^2=3.1416\cdot 20^2-3.1416\cdot 15^2\doteq 549.7787{\text{cm}}^2 \\ V=v\cdot S=227\cdot 549.7787\doteq 124799.7682{\text{cm}}^3 \\ {m}_1=h\cdot V=2.8\cdot 124799.7682\doteq 349439.3509\text{g} \\ m=m_1\to \text{kg}=m_1:1000\text{kg}=349439.3509:1000\text{kg}=349.43935\text{kg} \\ m>100kg \end{gathered}$$

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