Question

$\huge\frak\red{AnSwer}$


Summary of chapter surface area and volume

No copied Answer !
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Answer 1

Solution :-

$\:\sf\underline\red{Cuboid}\:$

• Surface area = 2(lb + bh + hl )

• volume = ( l × b × h)

$\:\sf\underline\purple{Cube}\:$

• Surface area = 6${a}^{2}$

• volume = ${a}^{3}$

$\:\sf\underline\pink{cylinder}\:$

• curved surface area = 2πrh

• Total surface area = 2πr(r+h)

• volume of cylinder =π${r}^{2}$h

$\:\sf\underline\orange{cone}\:$

• curved surface area = πrl

• T.S.A of right circular cone = πr(l + r)

• Volume of cone = $\dfrac{1}{3}$ π${r}^{2}$h

$\:\sf\underline\red{hemisphere}\:$

• curved surface area= 2π${r}^{2}$

• Total surface area= 3π${r}^{2}$

• Volume= $\dfrac{2}{3}$π${r}^{3}$

$\huge\underline\bold\orange{Additional}$

1. Surface area of sphere of radius

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ = 4 π${r}^{2}$

2. Volume of sphere of radius (r)

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= $\dfrac{4}{3}$π${r}^{3}$