Answer: 400 m.
- A 0
- B 200 m
- C 400 m
- D 800 m
Correct answer: C. 400 m
Explanation: Distance is the total path length = 400 m. Displacement = 0 since they returned to start.

Projectiles at equal speed: range is maximum at 45°, and complementary angles (30° and 60°) share the same range. Image: Cmglee, CC BY-SA 3.0, via Wikimedia Commons.
Concept context
Vectors, projectile motion, uniform circular motion, and relative velocity - the foundation of 2D kinematics for NEET and JEE.