4. John wants to cover a box entirely with silver paper. How many square centimetres

Mathematics

2 answers:

Mice21 [21]3 years ago

7 0

Answer: 4=C. 4 164 sq cm

5=A. 5.0 sq dm

6=B. 272.6 sq dm

HOPE THIS HELPS

Bess [88]3 years ago

4 0

Answer:

l=22cm

b:16cm

h:10cm

surface area =2(lb+bh+lh)=2(22*16+16*10+22*10)

=1464cm²

a=2.5dm

area cubical soda cracker box=6a²=6*2.5²=37.5dm²

r=1.5dm

area of ball=4πr²=4π×1.5²=28.27dm² per ball

for 10 bal =28.27×10=282.6dm²

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Check the picture below.

$\bf \textit{total surface area of a cone}\\\\
SA=\pi r\sqrt{r^2+h^2}+\pi r^2~~
\begin{cases}
r=radius\\
h=height\\
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r=17\\
\sqrt{r^2+h^2}=12
\end{cases}
\\\\\\
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