Question

A train in moving at a speed of 132 kmph. If the length of the train is 110 meters, how long will it taken to cross a railway platform 165 m long?

• A. 5 sec
• B. 7.5 sec
• C. 10 sec
• D. 15 sec.

Answer 1

The correct option is B 7.5 sec

$Speed=(132\times \frac{5}{18})m/sec=\frac{110}{3}m/sec.$
$\text{Total distance covered}$
$=(110+165)m=275m.$
$\therefore \text{Required time}=(275\times \frac{3}{110})sec.=7.5seconds.$