# Arithmetic Aptitude :: Problems on Trains

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## 1. A train 575 m long crosses a tunnel of length 325 in 90 sec. What is the speed of the train in kmph.

**Answer:**

**Option C**

**Explanation :**

Total distance traveled = Length of train + Length of tunnel

= 575 + 325 = 900.

Time taken to cross the tunnel = 90 sec.

Speed in kmph = distance/time * 18/5 = 900/90 * 18/5 = 180/5 = 36 kmph.

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