Question

Can you give me all formulas of surface area and volume of class 8th.?????

Answer 1

surface areas :

1) Area of cuboid =2(lb+bh+hl) sq.unit
2) Area of cuboid [lateral]= under root L2 +B2 +H2
3) Area of cube = 6×(side)2
4) Area of cube [lateral]= 4×side2
5) Area of cylinder= 2pier (h+r)


volume :
1) Volume of cuboid = l×b×h
2) Volume of cube = side × side × side
3)Volume of cylinder = pie r2 h




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Answer 2

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$\bf\Huge\red{\mid{\overline{\underline{ ANSWER }}}\mid }$

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$\Large\fbox{\color{purple}{QUESTION}}$

SURFACE AREA VOLUME FORMULAS

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$\Large\fbox{\color{purple}{ SOLUTION }}$

$\Large\mathcal\purple{CUBOID}$

$\implies \: lsa = 2(l + b)h \\ \\ \: \implies \: tsa = 2(lb + bl + hl) \\ \\ \implies \: volume \: = l \times b \times h$

$\Large\mathcal\blue{CUBE}$

$\implies \: lsa = {4a}^{2} \\ \\ \implies \: tsa = {6a}^{2} \\ \\ \implies \: volume = {a}^{3}$

$\Large\mathcal\brown{CYLINDER}$

$\implies \: csa = 2\pi \: r \: h \\ \\ \implies \: tsa = 2\pi \: r(r + h) \\ \\ \implies \: volume \: = \pi \: {r}^{2} h</p><p>$

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