A train 120 m long and passes a platform 180 m long in 18 seconds. Find its speed.

Correct option is A

Given:
Length of train = 120 m
Length of platform = 180 m
Time taken = 18 seconds
Formula Used:
Speed = $$\frac{Total\ Distance}{Time}$$​​
To convert m/s to km/h, multiply by $$\frac{18}{5}.$$​​
Solution:
The total distance covered by the train to pass the platform is the sum of its own length and the platform's length.
Total Distance = 120 + 180 = 300 m
Speed in m/s =  $$\frac{300}{18}$$​​
Convert the speed into km/h.
Speed in km/h = $$\frac{300}{18} × \frac{18}{5}$$​​
 = $$\frac{300}{5}$$​= 60 km/h
Final Answer
So the correct answer is (a)