If a car travels 120 km at a speed of 60 km/h and then 180 km at a speed of 90 k

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Question: If a car travels 120 km at a speed of 60 km/h and then 180 km at a speed of 90 km/h, what is the total time taken for the journey?

Options:

Correct Answer: 4 hours

Solution:

Time for first part = 120/60 = 2 hours; Time for second part = 180/90 = 2 hours. Total time = 2 + 2 = 4 hours.

If a car travels 120 km at a speed of 60 km/h and then 180 km at a speed of 90 km/h, what is the total time taken for the journey?

If a car travels 120 km at a speed of 60 km/h and then 180 km at a speed of 90 km/h, what is the total time taken for the journey?

Step 1: Identify the distance and speed for the first part of the journey. The distance is 120 km and the speed is 60 km/h.
Step 2: Calculate the time taken for the first part using the formula: Time = Distance / Speed. So, Time = 120 km / 60 km/h.
Step 3: Perform the calculation for the first part: 120 / 60 = 2 hours.
Step 4: Identify the distance and speed for the second part of the journey. The distance is 180 km and the speed is 90 km/h.
Step 5: Calculate the time taken for the second part using the same formula: Time = Distance / Speed. So, Time = 180 km / 90 km/h.
Step 6: Perform the calculation for the second part: 180 / 90 = 2 hours.
Step 7: Add the time taken for both parts of the journey to find the total time. Total time = 2 hours (first part) + 2 hours (second part).
Step 8: Perform the addition: 2 + 2 = 4 hours.

Speed, Distance, Time Relationship – Understanding the relationship between speed, distance, and time, where time is calculated as distance divided by speed.
Total Time Calculation – Calculating the total time for multiple segments of a journey by summing the individual times.