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  1. GATE CS
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Ms. X came out of a building through its front door to find her shadow due to the morning sun falling to her right side with the building to her back. From this, it can be inferred that the building is facing _________. A. North B. East C. West D. South

GATE 2021 · General Aptitude · Direction Sense · medium

Answer: The building is facing South. Answer: D.

  1. Establish shadow direction: Morning sun rises in the East. Shadows fall in the opposite direction = West. So Ms. X's shadow points West.
  2. Determine which way Ms. X faces: Shadow falls to Ms. X's right side, meaning West is to her right. When West is to the right and East is to the left, the person must be facing South (and North is behind).
  3. Identify building front direction: Ms. X exited and her back is to the building's front door. She faces South. Therefore the front door (and the building) faces South.