What are the speeds of two trains 80 m and 85 m long respectively?
(A) They take 37.5 seconds to pass each other when they are both running in the same direction
(B) They take 7.5 seconds to pass each other running in opposite directions


1. statement (A) alone is sufficient but statement (B) alone is not
2. statement (B) alone is sufficient but statement (A) alone is not
3. both (A) and (B) together are sufficient but none of them alone is sufficient
4. both statements are sufficient independently
5. both (A) and (B) together are not sufficient


Please provide your answer with explanations...thanks in advance