Question

Diameter of the base of a cone is 10.5cm and its slant height is 10 cm find its curved surface area

Answer 1

THANKS FOR THE QUESTION !

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ANS :

...................... 165 CM^2 ...................

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GIVEN :

=> DIMENSIONS OF A CONE

DIAMETER OF BASE :

=> 10.5CM

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SLANT HEIGHT :

=> 10CM

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TO FIND :

=> CURVED SURFACE AREA OF THAT CONE

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CURVED SURFACE AREA OF A CONE :

=> π * R ( RADIUS ) * L ( SLANT HEIGHT )

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FROM THE FORMULA ,

=> WE NEED THE RADIUS OF THE BASE

=> AND WE HAVE GIVEN THE DIAMETER

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=> RADIUS = 1/2 * DIAMETER

=> RADIUS = 1/2 * 10.5 CM

=> RADIUS = 5.25 CM

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CURVED SURFACE AREA OF THE CONE :

=> π * R * L.

=> 22 / 7 * 5.25 CM * 10 CM

=> 22 / 7 * 52.5 CM^2

=> 22 * 7.5 CM^2

=> 165 CM^2

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HOPE IT WILL HELP U ......

THANKS AGAIN ........

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Answer 2

Answer:

Step-by-step explanation:

Given :-

Diameter of the base of cone = 10.5 cm

Slant height of cone (l) = 10 cm

To Find :-

Curved surface area

Formula to be used :-

Curved surface area of cone = πrl

Solution :-

Radius of cone (r) = 10.5/2 cm

Curved surface area of cone = πrl

Curved surface area of cone = 22/7 x 10.5/2 x 10

Curved surface area of cone = 165 cm²

Hence, Curved surface area of cone is 165 cm².