A bullet train is traveling at a speed of 131 km/h. How many seconds will it take to cover a distance of 9.8… - KPSC Staff Nurse - 2017

KPSC Staff Nurse - 2017

Non Nursing Subjects

Hard

Appeared in: KPSC Staff Nurse - 2017

Explanation

The fundamental formula relating speed, distance, and time is Time = Distance / Speed.
A direct calculation using the given units (9.8 km / 131 km/h) yields approximately 0.0748 hours, which converts to about 269 seconds. This result does not match any of the options.
The discrepancy suggests a typographical error in the question. The speed was likely intended to be 131 m/s instead of 131 km/h.
To perform the calculation with the corrected units, the distance must be converted from kilometers to meters: 9.8 km = 9800 meters.
Using the corrected speed and converted distance, the time is calculated as: Time = 9800 m / 131 m/s ≈ 74.8 seconds.
Rounding 74.8 seconds to the nearest whole number gives 75 seconds, which corresponds to the correct option.

Option B: This is an incorrect calculation. To arrive at 90 seconds, the speed would need to be approximately 108.9 m/s (9800 m / 90 s), which is not the value given.
Option C: This is an incorrect calculation. To arrive at 105 seconds, the speed would need to be approximately 93.3 m/s (9800 m / 105 s), which is not the value given.
Option D: This is an incorrect calculation. To arrive at 120 seconds, the speed would need to be approximately 81.7 m/s (9800 m / 120 s), which is not the value given.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Calculation of time from speed and distance as background academic context rather than a clinical decision trigger.
This question tests fundamental mathematical aptitude and attention to detail, which are crucial skills for nurses in clinical practice.
Nurses frequently perform time-sensitive calculations for drug dosages, IV drip rates, and fluid balance, where accuracy is paramount for patient safety.
What if? If a nurse were calculating an infusion time and made a similar unit error (e.g., using minutes instead of hours), it could lead to a dangerously fast or slow administration of medication, potentially causing adverse reactions or therapeutic failure.

How to Approach the Question

First, identify the knowns (Distance = 9.8 km, Speed = 131 km/h) and the unknown (Time in seconds).
Recall the relevant physics formula: Time = Distance / Speed.
Before calculating, check for unit consistency. The speed is in km/h, distance in km, and the required answer is in seconds. This means a unit conversion will be necessary.
Perform the calculation with the given units: Time = 9.8 km / 131 km/h ≈ 0.0748 hours.
Convert the result into the required units: 0.0748 hours × 3600 seconds/hour ≈ 269 seconds.
Compare your calculated answer with the given options. If it does not match, critically re-examine the question for potential errors, such as a typo in the units (e.g., km/h vs. m/s).

Concept Tested & Keywords

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