A train is running at the speed of 100 km/hr and every 75 km train stops for 3 minutes. How much time will it take to reach 600 km?

Appeared in: BSF Staff Nurse - 2021

Explanation

The pure travel time is calculated by dividing the total distance by the speed: 600 km / 100 km/hr = 6 hours.
The train stops every 75 km. Over a 600 km distance, this results in 600 / 75 = 8 stop intervals.
The final stop at the 600 km mark is the destination, so the waiting time there is not counted as part of the journey. This leaves 7 intermediate stops.
The total time spent stopping is the number of intermediate stops multiplied by the duration of each stop: 7 stops × 3 minutes/stop = 21 minutes.
The total journey time is the sum of the travel time and the stoppage time: 6 hours + 21 minutes.

Option A: This answer is derived by incorrectly including the stop at the final destination. If all 8 stops are counted (8 stops × 3 minutes = 24 minutes), the total time becomes 6 hours and 24 minutes. The stop at the destination does not add to the travel duration.
Option C: This answer only accounts for the travel time (600 km / 100 km/hr = 6 hours) and completely ignores the time the train spends stationary at the intermediate stops.
Option D: This answer does not correspond to any logical calculation based on the data provided in the problem. It likely results from a significant miscalculation of either the number of stops or the total stoppage time.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Time, Speed, and Distance with Stoppages as background academic context rather than a clinical decision trigger.
This is a general aptitude and reasoning question, not a clinical one.
This type of problem tests logical thinking and attention to detail, which are essential skills for nurses in managing time-sensitive tasks and medication schedules.
For example, calculating infusion times or planning a sequence of patient care activities requires similar step-by-step problem-solving.

How to Approach the Question

First, identify all the numerical values provided: Total Distance (600 km), Speed (100 km/hr), Stop Interval (every 75 km), and Stop Duration (3 minutes).
Calculate the base travel time as if there were no stops. Use the formula: Time = Distance / Speed.
Next, determine the number of stops. Divide the total distance by the distance of one interval (600 / 75).
Critically analyze the result. Realize that the stop at the final destination (600 km) does not add to the journey time. Subtract 1 from the total number of stops calculated.
Calculate the total stoppage time by multiplying the number of intermediate stops by the duration of each stop.
Finally, sum the base travel time and the total stoppage time to find the total journey duration.

Concept Tested & Keywords

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Practise the full BSF Staff Nurse - 2021

Attempt every question from this paper in a timed mock, then review the full solution for each one.