A person travels 120 km at a speed of 40 km/h and returns at a speed of 60 km/h.

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Question: A person travels 120 km at a speed of 40 km/h and returns at a speed of 60 km/h. What is the total time taken for the round trip?

Options:

Correct Answer: 5 hours

Solution:

Time = Distance / Speed. Time to go = 120 km / 40 km/h = 3 hours. Time to return = 120 km / 60 km/h = 2 hours. Total time = 3 + 2 = 5 hours.

A person travels 120 km at a speed of 40 km/h and returns at a speed of 60 km/h. What is the total time taken for the round trip?

A person travels 120 km at a speed of 40 km/h and returns at a speed of 60 km/h. What is the total time taken for the round trip?

Step 1: Identify the distance traveled one way, which is 120 km.
Step 2: Identify the speed for the first part of the trip, which is 40 km/h.
Step 3: Calculate the time taken to go 120 km at 40 km/h using the formula Time = Distance / Speed. So, Time to go = 120 km / 40 km/h = 3 hours.
Step 4: Identify the speed for the return trip, which is 60 km/h.
Step 5: Calculate the time taken to return 120 km at 60 km/h using the same formula. So, Time to return = 120 km / 60 km/h = 2 hours.
Step 6: Add the time taken for both parts of the trip to find the total time. Total time = 3 hours + 2 hours = 5 hours.

Speed, Distance, and Time – Understanding the relationship between speed, distance, and time, and how to apply the formula Time = Distance / Speed.
Average Speed – Recognizing that the average speed for a round trip is not simply the average of the two speeds due to differing distances.