There are 4 carriages in a train and each carriage has 25 seats. If each carriage could accommodate 10 more passengers, how many passengers would fill up 3 trains? Give me reasons, before answering the question
If each carriage had another 10 seats, each carriage would have 25 + 10 = 35 seats. The train comprises of 4 carriages and each carriage now has 35 seats; therefore a train has 35 x 4 = 140 seats. 3 trains with 140 seats each in total can take up 3 x 140 = 420 passengers. So the final answer is 420.