Final answer:
At a speed of 10 km/min, it would take the bullet train 15 minutes to cover the distance of 150 km. This is found by dividing the distance (150 km) by the speed (10 km/min). Option D is correct.
Step-by-step explanation:
If the speed of the bullet train increases to 10 km/min, we can calculate the required time to cover the same distance of 150 km by dividing the total distance by the speed.
To find the time (t) required, we use the formula:
t = distance / speed
Substituting the given values into the formula, we get:
t = 150 km / 10 km/min
This simplifies to:
t = 15 min
Therefore, the time required to cover the same distance of 150 km at a speed of 10 km/min is 15 minutes, which corresponds to option D.
To find the time required to cover the same distance when the speed increases to 10 km/min, we can divide the distance by the new speed. So, 150 km divided by 10 km/min gives us 15 minutes. Therefore, the time required to cover the same distance is 15 minutes.