Given: Ramesh travelled 1200 km by air which formed 32​ of his trip. One-third of the remaining trip he travelled by car And the rest of the journey he performed by train. Formula Used: Distance = Speed × Time Calculation: Let the total distance to travel be ‘a’. According to the question 32a​=1200 ⇒ a = 1800 km Again, According to the question ⇒ Distance travelled by car =31​×(1800−1200)=200 km ⇒ Distance travelled by train = 1800 – 1200 – 200 = 400 km ∴ None of the answers match, answer is d.