At one station, the train jerked for 2 hours. How much does the train need to speed up

At one station, the train jerked for 2 hours. How much does the train need to speed up to arrive at the next station, located 40 km away, on time?

From the conditions of this problem, it follows that the train was delayed for 2 hours, while the distance to the next station is 40 kilometers.
Find how much the train needs to speed up to the next station in order to arrive on time.
Since we know the time and distance that the train must travel. So, we find its speed. For this we use the following formula.
V = S / t.
Where S is the distance the train must travel.
V is the speed at which it should drive.
t is the time it will take to arrive.
V = 40 km ÷ 2 = 20 km / h.
Answer: increase the speed by 20 km / h.