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CBSE Class 10 Maths (Standard) 2015 · Paper 30/1/1 · Question 17

Surface Areas and Volumes 3 marks Medium
In Fig. 4, from the top of a solid cone of height cm and base radius cm, a cone of height cm is removed by a plane parallel to the base. Find the total surface area of the remaining solid.
4 cm 12 cm 6 cm
Figure 4: a cone of height 12 cm and base radius 6 cm; the top 4 cm is cut off by a plane parallel to the base.

Answer

The total surface area of the remaining solid is about cm².

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