Question

find the total surface area of a right circular cylinder whose radius is 0.7 cm and height is 1 metre​

Answer 1

Step-by-step explanation:

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Answer 2

Given : A right circular cylinder whose radius is 0.7 cm and height is 1 metre or 100 cm [ 1m = 100 cm]

Need To Find : Total Surface Area of Right Circular Cylinder.

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❍ Finding Total Surface Area of Cylinder using the formula is given by :

$\underline {\frak{\dag As,\:We\:know\:that\::}}$

⠀⠀⠀⠀⠀$\underline {\boxed { \sf{ Total\:Surface \:Area\:_{(Cylinder)} = 2\pi r ( r + h ) \:sq.units}}}$

⠀⠀⠀⠀⠀Here r is the Radius of Cylinder in cm , h is the Height of Cylinder in cm & $\pi =\dfrac{22}{7}$.

⠀⠀⠀⠀⠀⠀$\underline {\bf{\star\:Now \: By \: Substituting \: the \: Given \: Values \::}}$

⠀⠀⠀⠀⠀$:\implies \sf{ Total\:Surface \:Area\:_{(Cylinder)} = 2\times \pi \times 0.7 ( 0.7 + 100 ) \:}$

⠀⠀⠀⠀⠀$:\implies \sf{ Total\:Surface \:Area\:_{(Cylinder)} = 2\times \pi \times 0.7 \times 100.7 \:}$

⠀⠀⠀⠀⠀$:\implies \sf{ Total\:Surface \:Area\:_{(Cylinder)} = 2\times \pi \times 70.49 \:}$

⠀⠀⠀⠀⠀$:\implies \sf{ Total\:Surface \:Area\:_{(Cylinder)} = 2\times \dfrac{22}{\cancel {7}} \times \cancel {70.49} \:}$

⠀⠀⠀⠀⠀$:\implies \sf{ Total\:Surface \:Area\:_{(Cylinder)} = 2\times 22 \times 10.07 \:}$

⠀⠀⠀⠀⠀$:\implies \sf{ Total\:Surface \:Area\:_{(Cylinder)} = 44 \times 10.07 \:}$

⠀⠀⠀⠀⠀$\underline {\boxed{\pink{ \mathrm {  Total \:Surface\:Area_{(Cylinder)} = 443.08\: cm^{2}}}}}\:\bf{\bigstar}$

Therefore,

⠀⠀⠀⠀⠀$\underline {\therefore\:{ \mathrm {  Total \:Surface\:Area \:of\:Cylinder \:is\bf{\:443.08\: cm^{2}}}}}$

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