Initial data: t (travel time of a passenger train) = 30 min = 1/2 h; S (distance traveled by the passenger train) = 30 km.
We calculate the speed of a passenger train using the formula: V = S / t.
Let’s make a calculation: V = 30 / 1/2 = 30 * 2 = 60 km / h.
Answer: The speed of a passenger train is 60 km / h.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.