Discussion
In the given diagram, ovals are marked at different heights (h) of a hill. Which one of the following options P, Q, R, and S depicts the top view of the hill?
Answer: B
The top view is Q.
The profile shows the hill rising steeply on the near side (summit at about 0.22 km from the origin) and sloping gently away beyond it. Seen from above, each horizontal cross-section becomes an oval. Near the summit they are small and sit close to the origin end. Lower down they grow, but their near edges stay close together, because the near slope is steep, while their far edges spread out, because the far slope is gentle.
Q shows exactly this: the smallest ovals near the origin end and the outlines crowded on the left and spread out on the right. P puts the summit on the far side, R draws concentric ovals for a symmetric hill, and S does not crowd the outlines towards the origin side.
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