Distance from speed and time — Aptitude Question
Distance from speed and time: A car travels at 60 km/h for 2 hours 30 minutes. How far does it go? Answer and worked solution on CodeKairo.
- Topic: Time, Speed & Distance
- Section: Quantitative Aptitude
- Difficulty: Easy
- Time target: 40 seconds
Question
A car travels at 60 km/h for 2 hours 30 minutes. How far does it go?
Options
- 120 km
- 140 km
- 150 km
- 180 km
Show the answer and the worked solution
Correct answer: C. 150 km
Worked solution
- Time = 2.5 hours.
- Distance = 60 × 2.5 = 150 km.
Answer: 150 km.
The idea
Express time as a decimal or fraction of an hour before multiplying. Treating 2 h 30 min as 2.30 gives 138 and is wrong.
Shortcut. 60 km/h is 1 km a minute, and 2 h 30 min is 150 minutes, so the car covers 150 km.
Common trap. 120 km — multiplying by the 2 hours and dropping the 30 minutes; the extra half hour adds another 30 km.