Question

A railway passenger counts the telegraph posts on the line as he passes them while travelling If the poles are 50 m apart and the train is going at the speed of 48 km/hr How many posts will be passed by the train per minute?

• A. 15
• B. 16
• C. 18
• D. 20

Answer 1

The correct option is B 16

Speed of the train =$48$km/hour
=$\frac{48\times 1000m}{60minutes}$
=$800m/minutes$
$\therefore$ In $1$minutes the train crosses $800$m
If the poles are $50m$ apart then the number of poles in $800m$ stretch
=$\frac{800}{50}$
$=16$ poles