Phrases Previous Year Questions (PYQs) – Train
Study Stuff for MCA Examinations
Solution
Solution
Speed of Duronto Train
Step 1: Rajdhani crosses a platform equal to its length in 36 sec.
Let length of Rajdhani = L meters ⇒ Platform = L meters ⇒ Total distance = 2L meters
Speed = 54 km/hr = 15 m/s
So, 2L = 15 × 36 = 540 ⇒ L = 270 m
Step 2: Duronto (length 230 m) crosses same platform (270 m) = total distance = 500 m
Time = 25 sec
Speed = Distance / Time = 500 / 25 = 20 m/s
Convert to km/hr: 20 × 18 / 5 = 72 km/hr
✅ Final Answer: 72 km/hr
Solution
Train Collision Problem
Navjivan Express leaves Ahmedabad at 6:30 am traveling at 50 km/h towards Baroda (100 km away).
At 7:00 am, Howrah-Ahmedabad Express leaves Baroda towards Ahmedabad at 40 km/h.
At 7:30 am, Mr. Shah realizes both trains are on the same track heading toward each other.
Navjivan distance by 7:30 am = 50 km/h × 1 h = 50 km
Howrah distance by 7:30 am = 40 km/h × 0.5 h = 20 km
Distance between trains at 7:30 am = 100 − (50 + 20) = 30 km
Relative speed = 50 + 40 = 90 km/h
Time until collision = 30 km / 90 km/h = 1/3 hour = 20 minutes
Time to avert collision: 20 minutes
Solution
Solution
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