Q. 14.7( 6 Votes )

Find the volume, curved surface area and the total surface area of a cone having base radius 35 cm and height 84 cm.

Answer :

Given,


Radius of the cone = 35cm


Height of the cone = 84cm


Curved surface area = πrl


So, we need to find out the l;


l = slant height




l = 91cm


Curved surface area =


= 110 × 91 = 10010cm2


Volume of the cone =


=


= 88 × 1225


= 107800cm2


Total surface area = πrl + πr2



= 10010 + 3850 = 13860


Total surface area = 13860cm2


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