A train 150 m long travelling at 90 km per hour takes how long to pass a stationary pole?
- A. 4 seconds
- B. 6 seconds
- C. 10 seconds
- D. 15 seconds
Explanation
Converting 90 km per hour by multiplying by 5 and dividing by 18 gives 25 m per second, and 150 divided by 25 is 6 seconds. To pass a pole the train covers only its own length, whereas passing a platform would require its length plus the platform's. Forgetting the unit conversion is the usual mistake.
Related questions
If today is Wednesday, what day will it be after 100 days?
A man is 24 years older than his son. In two years, his age will be twice that of his son. What is the son's present age?
A shopkeeper sells an item for Rs. 240 at a profit of 20 per cent. What was the cost price?
If 5 workers build a wall in 12 days, how long would 6 workers take, working at the same rate?
The average of five numbers is 20. If one number is removed, the average of the rest is 22. What was the number removed?