1.

Find the volume the curved surface area and the total surface area of the cylinder having dimension radius 5 cm height 21 CM

Answer»

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Given :-

• Radius and height of a cylinder are respectively 5cm and 21cm.

To Find :-

• Volume

• Curved SURFACE AREA

• total surface area

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Volume of a cylinder is πr²h

= = > 22/7 × 5 × 5 × 21

= = > 1650cm³

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Total surface area of a cylinder is 2πr (h+r)

= = > 2 × 22/7 × 5 (21 + 5)

= = > 220/7 × (26)

= = > 817.14cm²

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Curved surface area of a cylinder is 2πrh

= = > 2 × 22/7 × 5 × 21

= = > 660cm³

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