Buses stop at a every 35 minutes. It is 10:42 PM now and a bus has stopped 8 minutes ago. At what time will the next bus stop?

Appeared in: AIIMS Manglagiri NO - 2019

Explanation

The first step is to determine the time the last bus stopped by subtracting 8 minutes from the current time: 10:42 PM - 8 minutes = 10:34 PM.
The problem states that buses stop at an interval of every 35 minutes.
To find the time of the next bus, add the 35-minute interval to the time the last bus stopped.
The calculation is 10:34 PM + 35 minutes. Adding the minutes (34 + 35) gives 69 minutes.
Since 69 minutes is equal to 1 hour and 9 minutes, the next bus will arrive at 11:09 PM.

Option A: This option represents an incorrect calculation. 10:52 PM is only 18 minutes after the last bus stopped at 10:34 PM, not the full 35-minute interval.
Option B: This option is incorrect. 11:02 PM is 28 minutes after the last bus stopped at 10:34 PM. The interval between buses is 35 minutes.
Option C: This option is incorrect. 10:57 PM is only 23 minutes after the last bus stopped at 10:34 PM, which does not match the 35-minute frequency.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Time Calculation and Logical Reasoning as background academic context rather than a clinical decision trigger.
Accurate time calculation is a fundamental skill required in many professions for scheduling appointments, managing time-sensitive tasks, and ensuring punctuality.
This type of logical reasoning problem tests attention to detail and the ability to perform sequential calculations, which are crucial for critical thinking in any field.
What if the bus had stopped 12 minutes ago instead of 8? The last bus would have been at 10:30 PM (10:42 - 12), and the next bus would be at 11:05 PM (10:30 + 35 mins).

How to Approach the Question

First, carefully read the problem and identify all the given numerical data: the current time (10:42 PM), the bus frequency (every 35 minutes), and when the last bus stopped (8 minutes ago).
The first calculation should be to determine the exact time of the last event. Use the current time and the 'minutes ago' information: 10:42 PM - 8 minutes = 10:34 PM.
Next, use the time of the last event and the given frequency to calculate the time of the next event. Add the interval to the time of the last bus: 10:34 PM + 35 minutes.
Perform the final addition. Be careful when the total minutes exceed 60. Here, 34 + 35 = 69 minutes.
Convert the total minutes into hours and minutes (69 minutes = 1 hour and 9 minutes).
Add this to the base hour to find the final time (10:00 PM + 1 hour 9 minutes = 11:09 PM) and select the matching option.

Concept Tested & Keywords

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Practise the full AIIMS Manglagiri NO - 2019

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