Harish started his journey at 18 : 40 and finished at 22 : 20. The time taken in completing the journey is—

The correct answer is 3 hours 40 minutes.

To find the total time taken for the journey, we need to calculate the difference between the finish time and the start time.

Start time = 18 : 40
Finish time = 22 : 20

Step 1: Calculate the duration from 18 : 40 to the next full hour (19 : 00):
Minutes remaining in the hour = 60 minutes - 40 minutes = 20 minutes.

Step 2: Calculate the duration from 19 : 00 to 22 : 00:
Hours difference = 22 - 19 = 3 hours.

Step 3: Add the remaining minutes past 22 : 00 to reach 22 : 20:
Additional minutes = 20 minutes.

Step 4: Sum up all the time intervals:
Total time = 20 minutes + 3 hours + 20 minutes
Total time = 3 hours + (20 + 20) minutes
Total time = 3 hours 40 minutes.

Thus, the time taken to complete the journey is 3 hours 40 minutes.