Question

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find CSA of a cylinder radius is 10, height is 21​

Answer 1

$\red\bigstar$Corrected Question :

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• $\dashrightarrow$find CSA of a cylinder radius is 10cm, height is 21cm

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$\pink\bigstar$Required Solution :

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$\dag$ Values Given to us :

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• $\dashrightarrow$radius of cylinder = 10cm

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• $\dashrightarrow$Height of cylinder = 21 cm

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$\green\bigstar$Required Diagram :

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$\setlength{\unitlength}{1mm}\begin{picture}(5,5)\thicklines\multiput(-0.5,-1)(26,0){2}{\line(0,1){40}}\multiput(12.5,-1)(0,3.2){13}{\line(0,1){1.6}}\multiput(12.5,-1)(0,40){2}{\multiput(0,0)(2,0){7}{\line(1,0){1}}}\multiput(0,0)(0,40){2}{\qbezier(1,0)(12,3)(24,0)\qbezier(1,0)(-2,-1)(1,-2)\qbezier(24,0)(27,-1)(24,-2)\qbezier(1,-2)(12,-5)(24,-2)}\multiput(18,2)(0,32){2}{\sf{10 cm}}\put(9,17.5){\sf{21 cm}}\end{picture}$

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$\dag$ Formula Used Here :

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• $\dashrightarrow$2 πrh

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$\dag$ Putting Value In Formula :

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• $\dashrightarrow$CSA = 2 × 22 / 7 × 21 × 10

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• $\dashrightarrow$CSA = 2 × 22 × 3 × 10 cm

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• $\dashrightarrow$CSA = 44 × 30 cm

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• $\dashrightarrow$CSA = 1320cm²

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$\dag$CSA Of Cylinder 1320 cm²

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$\blue\bigstar$Note :

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• $\dashrightarrow$Kindly view answer from brainly.in for clear view of diagram !

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Answer 2

Answer:

1320 sq. units

Explanation:

Given -

Radius of cylinder (r) = 10

Height of cylinder (h) = 21

To find -

C. S. A. (Curved Surface Area) of the cylinder

Solution -

C. S. A. of cylinder = 2πrh

$= 2 \times \frac{22}{7} \times 10 \times 21 \\ = \frac{2 \times 22 \times 10 \times 21}{7} \\ = 2 \times 22 \times 10 \times 3 \\ = 132 \times 10 \\ = 1320$

Hence C. S. A. of cylinder = 1320 sq. Units.

hope it helps.