Time for a journey — Aptitude Question
Time for a journey: How long does a train take to cover 330 km at 55 km/h? Answer and worked solution on CodeKairo.
- Topic: Time, Speed & Distance
- Section: Quantitative Aptitude
- Difficulty: Easy
- Time target: 35 seconds
Question
How long does a train take to cover 330 km at 55 km/h?
Options
- 5 h
- 6 h
- 6.5 h
- 7 h
Show the answer and the worked solution
Correct answer: B. 6 h
Worked solution
- Time = 330 ÷ 55 = 6 hours.
Answer: 6 h.
The idea
The three quantities are linked by distance = speed × time; rearrange for whichever is missing.
Shortcut. Back-substitute: 55 × 6 = 330 (55 × 2 = 110, tripled), so 6 h.
Common trap. 6.5 h is where estimating with a round 50 km/h leads: 330 ÷ 50 = 6.6 h. Check by multiplying instead — 55 × 6 = 330 exactly, so the time is 6 h.