Time, Speed, and Distance (TSD) remains a cornerstone of the Arithmetic section in CAT, consistently accounting for 3-5 questions every year. While the core formulas remain simple, the "CAT Twist" lies in how these concepts are layered.

The TSD Weightage: What to Expect?

Based on an analysis of CAT papers from the last five years, TSD isn't just about $Speed = \frac{Distance}{Time}$. The IIMs focus heavily on Relative Speed and Average Speed, often combining them with Ratio and Proportion concepts to test your logical depth.

How to Approach TSD for CAT 2026?

1. Master Ratios: 80% of TSD questions can be solved without heavy calculations if you understand that Speed is inversely proportional to Time (when distance is constant).

2. Visualization is Key: For Relative Speed and Trains, always draw a rough number line. Visualizing the "gap" between two objects helps avoid calculation errors.

3. Units Matter: CAT often mixes km/hr and m/s in the same question. A "Geek" tip: multiply by $\frac{5}{18}$ to convert km/hr to m/s instantly.

4. The Average Speed Trap: Never use the harmonic mean formula $(\frac{2xy}{x+y})$ unless the distances covered are exactly equal. For all other cases, stick to:

   $$Average\ Speed = \frac{Total\ Distance}{Total\ Time}$$

Conclusion

If you are aiming for a 99+ percentile in Quants, you cannot afford to skip TSD. While the "Average Trend" shows a mix of difficulty levels, focusing on Relative Speed and Races will give you the highest ROI on your preparation time.