Block-shaped 21493

How many sheets need to be closed on the block-shaped container above), which is 4 m wide, 250 cm long, and 35 dm high? How many liters of water can fit in it?

Correct answer:

S =  65.5 m²
V =  35000 l

Step-by-step explanation:

$$\begin{gathered} a=4\text{m} \\ b=250\text{cm}\to \text{m}=250:100\text{m}=2.5\text{m} \\ c=35\text{dm}\to \text{m}=35:10\text{m}=3.5\text{m} \\ S=2\cdot (a\cdot b+b\cdot c+c\cdot a)=2\cdot (4\cdot 2.5+2.5\cdot 3.5+3.5\cdot 4)=65.5{\text{m}}^2 \end{gathered}$$

$$\begin{gathered} V_1=a\cdot b\cdot c=4\cdot 2.5\cdot 3.5=35{\text{m}}^3 \\ V=V_1\to \text{l}=V_1\cdot 1000\text{l}=35\cdot 1000\text{l}=35000\text{l}=35000\text{l} \end{gathered}$$

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