Question

6. A car travels at a speed of 60 km/h for 0.52 h, at 30 km/h for the next 0.24 h and then
at 70 km/h for the next 0.71 h. What is the average speed of the car?
7. The distance between two stations is 200 km. A train travels the first 100 km at a speed
of 50 km/h. How fast must the train travel for the next 100 km in order to maintain
the average speed of 70 km/h for the whole journey?
8. A car covers the first half of the distance between two places at a speed of 40 km/h and
the second half with a speed of 60 km/h. What is the average speed of the car?
9. Which of the following two options can be zero under certain conditions: average
speed or average velocity? Give examples.​

Answer 1

Answer:

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