Question

The upper solid is:

• A. a pentagonal prism having axis perpendicular to V.P.
• B. a triangular prism having axis parallel to H.P.
• C. a hexagonal pyramid having axis perpendicular to V.P.
• D. a hexagonal pyramid having axis perpendicular to H.P.

Hint:

An upright solid sitting flat on the H.P. always has its axis perpendicular to H.P. and parallel to V.P.

Answer 1

The Correct Option is D

Step 1: Identifying the Upper Solid Shape:
From the drawing on Page 14/15, the upper solid has a flat regular hexagonal base resting on the lower solid, and all its lateral edges converge to a single top vertex (apex). This is the definition of a hexagonal pyramid.

Step 2: Determining Axis Orientation:
The axis of the pyramid connects the center of its hexagonal base to its apex. This axis is perfectly vertical (upright). In standard projection terminology:
• A vertical line is perpendicular to the Horizontal Plane (H.P.) and parallel to the Vertical Plane (V.P.).

Step 3: Matching with Options:
This perfectly matches statement (D) “a hexagonal pyramid having axis perpendicular to H.P.”. Therefore, option (D) is the correct answer.