Time, Speed & Distance – Advanced Tricks + Train Models
Solve TSD problems faster using relative speed and shortcut techniques.
🔥 Shortcut Tricks
- Distance = Speed × Time
- Relative speed (same direction → subtract)
- Opposite direction → add speeds
- km/hr → m/s = ×5/18
Solve in 5 Seconds
Q1: 60 km/hr = ? m/s
Answer: 60 × 5/18 = 16.67 m/s
Q2: Two persons: 10 km/hr & 20 km/hr opposite → relative speed?
Answer: 30 km/hr
Exam Level Questions
Q3: Train of 200 m crosses pole in 20 sec. Find speed.
Solution:
Speed = 200/20 = 10 m/s = 36 km/hr
Q4: Two trains (100 m & 150 m) cross each other in 10 sec.
Solution:
Distance = 250 m
Speed = 250/10 = 25 m/s
Q5: Car goes 60 km/hr and returns 40 km/hr. Avg speed?
Shortcut:
(2xy)/(x+y) = (2×60×40)/(100)
Answer: 48 km/hr
Q6: Two persons start opposite direction: 10 & 15 km/hr. Distance = 50 km. Time?
Solution:
Relative speed = 25
Time = 50/25 = 2 hours
❌ Exam Trap
Q: Average speed = (x+y)/2?
Trap: ❌ WRONG
Correct:
(2xy)/(x+y)
Speed Booster Tip
Use relative speed concept instead of solving separately.
Quant • Time Speed Distance • Bank Exam Preparation
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