
Statements :
All mangoes are golden in colour. No golden coloured things are cheap.
Conclusions :
I. All mangoes are cheap.
II. Golden coloured mangoes are not cheap.
Speed of Train A = 75 km/h
Speed of Train B = 100 km/h
Initial distance between them = 100 km
After time T, the distance between them becomes 100 km again
They are moving in opposite directions on parallel tracks
✅ Step 1: Total relative speed when moving toward each other:
Since they’re moving in opposite directions:
Relative speed = 75 + 100 = 175 km/h
✅ Step 2: Key Idea:
They are initially 100 km apart.
They move toward each other, meet at some point, and then move away from each other until they are again 100 km apart.
So total distance traveled by both trains combined = 100 km (to meet) + 100 km (to separate again) = 200 km
✅ Step 3: Time = Distance ÷ Relative Speed
T = 200 ÷ 175 = 8⁄7 hours ≈ 1.14 hours
✅ Final Answer:
T = 8⁄7 hours or approximately 1 hour 8.57 minutes