Question

The radius of a cylinder is 14 cm and height is 20 cm. then-
(i) Find curved surface area.
(ii) Find total surface area.
(iii) Find the volume.​

Answer 1

Given:

• Radius of the cylinder = 14cm

• Height of the cylinder = 20cm

To find :

• CSA

• TSA

• Volume .

Solution :

i) As we know that :

• CSA of cylinder = 2 π rh

=> CSA of cylinder = 2 (22/7)( 14)(20)

=> CSA of cylinder = 88×20

=> CSA of cylinder = 1760 cm² .

ii) As we know that :

• TSA of cylinder = 2 π r ( r + h )

=> TSA of cylinder = 2 (22/7)(14)(14+20)

=> TSA of cylinder = 88(34)

=> TSA of cylinder = 2992 cm².

iii) As we know that :

• Volume of cylinder = π r² h

=> Volume of cylinder = (22/7) (14 ×14)(20)

=> volume of cylinder = 22×28×20

=> Volume of cylinder = 12320 cm³ .

Answer 2

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