The fast train covered 720 km in 6 hours. How much do you need to increase the speed

The fast train covered 720 km in 6 hours. How much do you need to increase the speed of the train so that it travels the same distance in 5 hours?

1. The train travel time is equal to: T1 = 6 hours;

2. The distance traveled by the train during this time is equal to: S = 720 km;

3. The speed at which the train was moving is: V1 = S / T1 = 720/6 = 120 km / h;

4. It is required to travel this distance in time: T2 = 5 hours;

5. The speed at which the train must travel is: V2 km / h;

V2 = S / T2 = 720/5 = 144 km / h;

6. The train must increase its speed by: Vo km / h;

Vo = V2 – V1 = 144 – 120 = 24 km / h;

Answer: the train speed must be increased by 24 km / h.