Four right-angle legs around a rectangle: Driver: North 20 km (breakfast) → Left 30 km (lunch) → Left 20 km (tea) → Left 30 km (to town). After evening tea, in which direction did he drive?

Introduction / Context:
The itinerary forms a rectangle. We are asked the direction of the leg immediately after the “evening tea” stop (i.e., the third stop).

Given Data / Assumptions:

• Leg 1: North 20 (breakfast).
• Leg 2: Left ⇒ West 30 (lunch).
• Leg 3: Left ⇒ South 20 (evening tea).
• Leg 4: Left from South ⇒ East 30 (to town).

Concept / Approach:
Left from South is East. The question references the leg after the evening tea stop, i.e., Leg 4.

Step-by-Step Solution:

Verification / Alternative check:
Opposite and adjacent legs of a rectangle match in length; the final leg mirrors the second.

Why Other Options Are Wrong:

• North/West/South are inconsistent with a left turn from South.

Common Pitfalls:
Answering with the direction “to tea” (South) rather than “after tea” (East).

Final Answer:
East