the diameter of the base of a right circular cylinder is 10cm and it’s height is 21cm find the area of the curved surface and volu

2 thoughts on “the diameter of the base of a right circular cylinder is 10cm and it’s height is 21cm find the area of the curved surface and volu”

1. Given :-

   The diameter of the base of a right circular cylinder is 10cm and it’s height is 21cm

   To Find :-

   CSA

   Volume

   Solution :-

   We know that

   Radius = Diameter/2

   Radius = 10/2

   Radius = 5 cm

   Now

   CSA = 2πrh

   CSA = 2 × 22/7 × 5 × 21

   CSA = 44/7 × 5 × 21

   CSA = 44 × 5 × 3

   CSA = 660 cm³

   Now

   Volume = πr²h

   Volume = 22/7 × (5)² × 21

   Volume = 22/7 × 25 × 21

   Volume = 22 × 25 × 3

   Volume = 1650 cm³

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2. Answer :

   • Curved surface area of cylinder is 660cm²
   • Volume of cylinder is 1650cm³

   Given :

   • The diameter of the base of right circular cylinder is 10cm
   • Height of cylinder is 21cm

   To find :

   • Area of curved surface
   • Volume of cylinder

   Solution :

   First we need to find the radius :

   Diameter is 10cm

   We know that,

   》Radius = Diameter/2

   》Radius = 10/2

   》Radius = 5cm

   Hence , Radius is 5cm

   • Radius is 5cm
   • Height is 21cm

   (1) Curved surface area of cylinder :

   As we know that,

   • Curved surface area of cylinder = 2πrh

   Where, r is radius and h is height

   》Curved surface area of cylinder = 2πrh

   》2 × 22/7 × 5 × 21

   》2 × 22 × 5 × 3

   》220 × 3

   》660cm²

   Hence , Curved surface area of cylinder is 660cm²

   (2) Volume of cylinder :

   As we know that

   • Volume of cylinder = πr²h

   》Volume of cylinder = πr²h

   》22/7 × (5)² × 21

   》22/7 × 5 × 5 × 21

   》22 × 5 × 5 × 3

   》550 × 3

   》1650cm³

   Hence , Volume of cylinder is 1650cm³

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