Question

the radius of a cylinder is 7cm and its height is 10 cm .find the curved surface area and total surface area___________​

Answer 1

Step-by-step explanation:

Curved surface area is 440 cm².

Total surface area is 748 cm².

Volume is 1540 cm³.

Step-by-step explanation:

Given : The radius of a circular cylinder is 7 cm, its height is 10 cm.

To find : The curved surface area, total surface area and volume of the cylinder ?

Solution :

The radius is r=7 cm

The height is h=10 cm

The curved surface area of the cylinder is

CSA=2\pi r hCSA=2πrh

CSA=2\times \frac{22}{7}\times 7\times 10CSA=2×

7

22

×7×10

CSA=440\ cm^2CSA=440 cm

2

The total surface area of the cylinder is

TSA=2\pi rh+2\pi r^2TSA=2πrh+2πr

2

TSA=440+2\times \frac{22}{7}\times 7^2TSA=440+2×

7

22

×7

2

TSA=440+308TSA=440+308

TSA=748\ cm^2TSA=748 cm

2

The volume of the cylinder is given by,

V=\pi r^2hV=πr

2

h

V=\frac{22}{7}\times 7^2\times 10V=

7

22

×7

2

×10

V=1540\ cm^3V=1540 cm

3