Question

A rectangular paper of width 14 cm is rolled along its width and a cylinder of radius 20 cm is formed. Find the volume of the cylinder). (Take22/7for pi)

[Marks = 4 marks]

Answer as Fast as Possible but answer correctly..​

Answer 1

Solution :

Here , it is mentioned that the width of the rectangular paper is 14 cm .

This is going to be the height of the cylinder when formed.

The radius of the cylinder is mentioned as 20 cm .

Now , we know that , volume of a cylinder is π r² h .

Substituting the given values :

=> π × 20 × 20 × 14

=> 22/7 × 20 × 20 × 14

=> 22 × 20 × 20 × 2

=> 44 × 400

=> 17600

Thus , the volume of the cylinder becomes 17600 cm³ .

This is the required answer.

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Additional Information :

Volume of a sphere = 4/3 π r³

Volume of a hemisphere = 2/3 π r³

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Answer 2

Hello mate..

$\huge⋇ \sf \red{solution}⋇$

GIVEN:

Width of the rectangular paper = 14cm. (as it's been rolled along the width, it becomes the height of the cylinder.)

radius(r) = 20cm.

π = 22/7.

TO FIND:

Volume of the cylinder.

$\bold \green{volume \: of \: the \: cylinder = \pi {r}^{2} h}$

$\bold{ = > \frac{22}{7} \times {20}^{2} \times 14} \\ \bold{ = > \frac{22}{7} \times 400 \times 14} \\ \bold{ = > \frac{22}{7} \times 5600} \\ \bold{ = > 22 \times 800} \\ \bold{ = > 17600.}$

∴Volume of the cylinder = 17600 cm³.

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HOPE THIS HELPS YOU..