Question

Volume of Cylinder 628 cm cube if height 20 cm find radius and curved surface area use Pie is equal to 3.14 ​

Answer 1

$\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}$

Actually Welcome to the Concept of the Surface Areas and Volumes

Basically here we are given with

V = 628 cm^3 and h = 20 cm

thus

pi r^2 h = 628

r^2 = 628/20*3.14

r^2 = 10

r = underoot 10 cm

thus r = 3.16 cm

Now the CSA = 2pirh

CSA = 2*3.14*3.16*20

CSA= 397.18 cm^2

Answer 2

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⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀$\huge{ \red{ \ddot{ \smile}}}$

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$\huge{ \green{ \boxed{ \fbox{ \green{ \frak{given}}}}}} = > \\ \large{\green{ \frak{v =628 c {m}^{3} }}} \\ \large{\green{ \frak{h = 20cm}}} \\ \\ \large{\green{ \frak{ \pi \: {r}^{2}h = 628 }}} \\ \large{\green{ \frak{ {r}^{2} = \frac{628}{20} \times 3.14 }}} \\ \\ \large{\green{ \frak{r = \sqrt{10} cm}}} \\ \\ so \\ \large{\green{ \frak{csa \: = 2 \pi \: rh}}} \\ \\ \large{\green{ \frak{csa = 397.18c {m}^{2} }}}$

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hops this may help you

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