The problem figure shows the top view of an object. Identify the correct elevation looking in the direction of arrow, amongst the answer figure's.
Show Hint
Project the plan on to a vertical plane in the direction of the arrow: blocks whose widths overlap in the plan show up as overlapping rectangles in the elevation.
The plan shows four separate blocks inside a rectangle, and the arrow below the plan means we look at the object from the bottom of the plan, so left and right are unchanged. Project the vertical edges of each block upwards: the left block splits into about three strips (a narrow strip, a middle strip and a wide box), the T-shaped block into two strips, the U-shaped block into three strips (two legs and the recess) and the right block into three strips. The blocks overlap in width (the T-shaped block overlaps the U-shaped block and the U-shaped block overlaps the right block), so the nearer blocks are drawn over the farther ones and the elevation is a row of many overlapping rectangles of different heights, about eleven or twelve strips in all. Options (2), (3) and (4) show only three or four large groups with no overlapping outlines, so they cannot represent four blocks with these many edges. Option (1) shows the long row of overlapping strips and matches the projection. Answer: (1) the first figure
