Me!

train a leaves melbourne for adelaide and travels at a constant speed. at the same time train b leaves adelaide for melbourne and also travels at a constant speed.
town x is between melbourne and adelaide. melbourne, town x and adelaide lie on a straight line. which train has greater speed?

which of following statements are sufficient to answer the question.
i. train b arrives at town x before train a.
ii. town x is farther to melbourne than adelaide.

the options are in the pic