Quantitative Aptitude – Time, Speed & Distance (Easy Concepts & Tricks)
Time, Speed, and Distance (TSD) is based on motion. It helps calculate how far and how fast something moves.
Basic Formula
Distance = Speed × Time
Speed = Distance / Time
Time = Distance / Speed
Easy Example
Question:
Speed = 60 km/h, Time = 2 hours
Distance = ?
Solution:
Distance = 60 × 2 = 120 km ✔
Unit Conversion
1 km/h = 5/18 m/s
1 m/s = 18/5 km/h
Average Speed
Formula:
Average Speed = Total Distance / Total Time
Special Case:
Equal distance → Avg speed = (2xy) / (x + y)
Train Concept
- Distance = Length of train
- Crossing → add lengths
Practice Questions
Q1: Speed = 50 km/h, Time = 3h → Distance?
Q2: Distance = 120 km, Speed = 60 km/h → Time?
Q3: Avg speed for 40 & 60 km/h (equal distance)?
Answers
Q1: 150 km
Q2: 2 hours
Q3: 48 km/h
Quick Tricks
- Use basic formula directly
- Convert units carefully
- Use shortcut for average speed
Final Tip
TSD becomes easy with practice. Focus on formulas and avoid calculation mistakes.
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