Which of the following does not describe a composite solid figure?A six faced solid figure with all sides of equal length.
An L shaped solid with a vertical rectangular prism and a cube attached at its lower right side.
A triangular prism attached at its base to a rectangular prism.
An upside down cylinder with its flat circular base attached to a cube that is above it.

Question

Which of the following does not describe a composite solid figure?A six faced solid figure with all sides of equal length.
		An L shaped solid with a vertical rectangular prism and a cube attached at its lower right side.
		A triangular prism attached at its base to a rectangular prism.
		An upside down cylinder with its flat circular base attached to a cube that is above it.

anonymous · Answer

i think the 1st one is does not describe a composite solid figure...
a composite solid figure is basically a solid made up of one or more primary solid figures..
our primary solid figures are..
1. Cone.
2. Cylinder..
3. Cube/Cuboid
4. Sphere/hemisphere
5. Prism.. etc

i hope u get it when i say primary solid figures.. means they are independent of each other.. say sphere & a cone.. there is no relation between them.. they don't help build each other..
but what about ice cream.. it is a composite solid figure.. (a hemisphere on a cone base).. 

now you look at each options ..
the 1st one describes a cube..which is essentially a primary solid figure & not composite.
the 2nd one an L shaped solid will have certainly two cuboids involved in making them..
the 3rd one is made up of two prisms hence made up of two primary figures..
the 4th one similar to the case of ice cream but cylinder in place of cone & cube in place of hemisphere..

hence the every option except the 1st one is a composite solid figure..