Explanations:The concept of a round trip involves traveling to a destination and then returning to the starting point. In this case, the person travels from Lucknow to Bhopal and then returns back to Lucknow. The distance between Lucknow and Bhopal is given as 686 km. To find the total distance covered in a round trip, we need to consider the distance traveled to the destination and the distance traveled back to the starting point.
Mathematically, the total distance covered in a round trip is twice the one-way distance. This is because the person travels the same distance twice: once to the destination and once back to the starting point. Therefore, the formula for the total distance covered in a round trip is:
Total distance = 2 × one-way distance
Substituting the given one-way distance of 686 km into the formula, we get:
Total distance = 2 × 686 km = 1,372 km
Thus, the total distance covered in the round trip from Lucknow to Bhopal and back to Lucknow is 1,372 km. This corresponds to Option A.
It is important to understand that the total distance for a round trip is always twice the one-way distance. This concept is fundamental in various real-world scenarios, such as travel planning, logistics, and transportation management. Misunderstanding this concept can lead to incorrect calculations and planning errors.