Directions : The problem figure shows the top view of an object. Identify the correct elevation, from amongst the answer figures, looking in the direction of arrow.
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A hexagon with a circle inside is a hexagonal slab carrying a cylinder. Looking at a corner of the hexagon, the slab shows two faces meeting at a central line.
The top view shows a regular hexagon with a vertex at the top and bottom, and a circle inside it. So the object is a hexagonal prism (a slab) with a cylinder standing on it; a cone would show its apex point in the plan and a frustum would show two circles. The arrow looks at the object from a hexagon vertex. From there two side faces of the slab are visible, meeting at a vertical edge in the centre, so the slab appears as a wide rectangle divided into two equal parts by a central vertical line. The cylinder has diameter about two thirds of the width of the slab and appears as a tall rectangle sitting centrally on it. Figure (1) shows a cone and figure (3) a frustum, so both are wrong. Figure (2) has its dividing line off centre. Figure (4) has the central line and a rectangle of the right width. Answer: (4) the fourth figure
