Watch Video Lecture on YouTube: 9 Common Speed, Time, Distance (Aptitude) Problems: Learn Advanced Shortcut Tricks

9 Common Speed, Time, Distance (Aptitude) Problems: Learn Advanced Shortcut Tricks

7 hr 45 min

Double speed

100 km/s

0, s=-16, 12

2:1

5:36

5:3

5 min fast

4:1

Next: Relative Speed

A train X departs from station A at 11.00 a.m. for station B, which is 180 km away. Another train Y departs from station B at 11.00 a.m. to station A. Train X travels at an average speed of 70 km/hr and does not stop anywhere until it arrives at station B. Train Y travels at an average speed of 50 km/hr, but has to stop for 15 minutes at station C, which is 60 km away from station B en route to station A. Ignoring the lengths of the trains, what is the distance, to the nearest km, from station A to the point where the trains cross each other

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