The problem figure shows the top view of an object. Identify the correct elevation from amongst the answer figures looking in the direction of the arrow.
Show Hint
Read the plan as three stacked blocks and check the alignment of their left and right edges; the correct elevation shows no extra vertical lines.
The top view shows three nested rectangles: a large outer rectangle (the lowest slab), a medium rectangle inside it whose left edge coincides with the left edge of the slab but which stops short of the slab on the right, and a small rectangle inside the medium one, set in from both its left and right edges. So the object is a three-step stack: a wide bottom slab, above it a block flush with the slab on the left but shorter on the right, and above that a narrower block standing wholly inside the width of the middle block. The arrow points up the page, so we look from the bottom of the plan; left of the plan remains left in the elevation. Option (1) has the top block's right edge flush with the middle block's right edge, which does not match (the plan shows a gap on the right). Option (3) shows an extra vertical line running through the middle block and option (4) shows an extra vertical line cutting the bottom and middle blocks; neither division exists in the plan. Option (2) shows the slab, a left-flush middle block shorter on the right, and a narrower top block inside the middle block, with no extra lines. Answer: (2) the elevation with left-flush stepped blocks and no extra vertical lines
