NCERT Class 10 Maths Solutions Chapter - 13 Surface Areas and Volumes, Ex - 13.5

Ex - 13.5

Question 1.


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Question 2.  A right triangle whose sides are 3 cm and 4 cm (other than hypotenuse) is made to revolve about its hypotenuse. Find the volume and surface area of the double cone so formed.

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Question 3.


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Question 4.



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Question 5.  Derive the formula for the curved surface area and total surface area of the frustum of cone, using the symbols as explained.

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Question 6.  Derive the formula for the volume of the frustum of a cone, given to you, using the symbols as explained.

Solution