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A car travels the first 19km of its journey at an average speed of 57 km/h and the remaining 55 km at an average speed of 110 km/h. find the average speed of the car of its entire journey

User Sooran
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6 votes

Answer:

Explanation:

To find the average speed of the car for the entire journey, we can use the concept of average speed formula. The average speed is calculated by dividing the total distance traveled by the total time taken.

Given:

- Distance of the first part of the journey = 19 km

- Speed of the first part of the journey = 57 km/h

- Distance of the second part of the journey = 55 km

- Speed of the second part of the journey = 110 km/h

Step 1: Calculate the time taken for each part of the journey.

Time = Distance / Speed

For the first part:

Time taken for the first part = 19 km / 57 km/h = 1/3 hours (approximately)

For the second part:

Time taken for the second part = 55 km / 110 km/h = 0.5 hours

Step 2: Calculate the total distance and total time.

Total distance = Distance of the first part + Distance of the second part = 19 km + 55 km = 74 km

Total time = Time taken for the first part + Time taken for the second part = 1/3 hours + 0.5 hours = 5/6 hours

Step 3: Calculate the average speed.

Average Speed = Total Distance / Total Time = 74 km / (5/6) hours = 88.8 km/h

The average speed of the car for the entire journey is approximately 88.8 km/h.

User Paul Alan Taylor
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