A train, 200 m long, is running at a speed of 45 km/hr. The time taken by the train to cross a 100 m long tunnel is

Correct option is C

Given
Train Length = 200 m
Tunnel Length = 100 m
Speed = 45 km/h

Formula Used
Time = $$\frac{\text{Total Distance}}{\text{Speed}}$$​​
Conversion: 1 km/h = $$\frac{5}{18} m/s$$​​

Solution
Total Distance = 200 + 100 = 300 m
Speed in m/s = $$45 \times \frac{5}{18} = \frac{225}{18} = 12.5 m/s$$​​
Time = $$\frac{300}{12.5} = 24 seconds$$​​

Final Answer
So the correct answer is (c)