Question

Q. A train of $19$ carriages, each of $60$ meters length along with an engine of $60$ meters length is running at a speed of $90$ km/h. At what time will the train cross a 2 km long bridge?

• A.
  2 minutes 8 seconds
• B.
  3 minutes 5 seconds
• C.
  3 minutes 12 seconds
• D.
  4 minutes 5 seconds

Answer 1

The correct option is A

2 minutes 8 seconds
Total distance $=(19\times 60)+60+(2\times 1000)=3200$ M
Speed of the train $=90$ km/hr $=90\times \left(\frac{5}{18}\right)=25$ m/s
Thus, the time taken $=\frac{3200}{25}=128$ seconds $=2$ minute 8 seconds