Question

The circumference of the base of a cylindrical vessel is 154cm and its hight is 25cm . Find its curved surface area.​

Answer 1

.Question.

The circumference of the base of a cylindrical vessel is 154cm and its hight is 25cm . Find its curved surface area.

.Answer.

we know that ::

C.S.A. of Cylinder is = 2πrh

[ 2πr is the circumference of circle ]

i.e. the base

given :

circumference = 154 cm ---------- [ i ]

height = 25 cm

•°• C.S.A. of the cylinder is =

=> 2 π r h

=> 154 × h [ from ( i ) ]

=> 154 × 25

=> 3850 cm²

•°• CSA of the cylinder is 3850 cm²

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more to know ::-

Formulas

• CYLINDER
• Curved Surface area = 2πrh
• Total Surface area = 2πr ( r + h )

• CONE
• Curved Surface Area = πrl
• Total Surface area = πr( l + r )

• SPHERE
• Surface Area = 4πr²

• HEMISPHERE
• Curved Surface area = 2πr²
• Total Surface area = 3πr²

• CUBOID
• volume : base area × height = l × b × h

• CUBE
• volume : s × s × s = a³