Which quantity: mass or weight, does not change by change of place?

State which of the quantities, mass or weight is always directed vertically downwards.

A train travels a distance of 300 km with an average speed of 60 km h^-1. How much time does it take to cover the distance?

A boy travels with an average speed of 10 m s^-1 for 20 min. How much distance does he travel?