Question

A rectangular paper has dimensions 15 cm x 3 cm. It is revolved about its width. Find the
volume of the cylinder so obtained​

Answer 1

If the sheet is rolled along its length then the circumference will be equal to the length of the rectangle.

∴2πr=44

∴r=

2×

7

22

44

∴r=7 cm

Also, height of the cylinder will be equal to the breadth of the rectangle.

∴h=18 cm

∴ volume of the cylinder =πr

2

h

=

7

22

×7

2

×18

=2772 cm

3

$\huge\underline{\mathbb\red{❥︎I}\green{p}\mathbb\blue{s}\purple{i}\mathbb\orange{t}\pink{a}}\:$

Answer 2

Answer:

A=L×B

15×3

=45

May be my answer is correct

Step-by-step explanation:

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