Question

A rectangular sheet of paper dimensions 20 cm x 14 cm is fold two types find the ratio of the volume of the cylinder​

Answer 1

Step-by-step explanation:

A rectangular paper of width 14 c is rolled along its width to form a cylinder.

Height of cylinder = h= 14 cm= width of rectangular paper.

And

Radius of cylinder = r= 20 cm.

Volume of the cylinder = πr

2

h

=

7

22

×20×20×14

=17600cm

3

∴ Volume of the cylinder = 17600cm

2

solution

Answer 2

Answer:

Length of rectangular piece of paper,l=20 cm

Breadth of rectangular piece of paper,b=14 cm

To find:

Radius of the base of the cylinder

Solution:

Circumference of base of cylinder=20 cm

2\pi r=202πr=20

We know that

\pi=\frac{22}{7}π=

7

22

2\times \frac{22}{7}\times r=202×

7

22

×r=20

r=\frac{20\times 7}{2\times 22}r=

2×22

20×7

r=\frac{35}{11} cmr=

11

35

cm

Hence, the radius of base of the cylinder=35/11 cm