1)Odometer of an automobile measures the distance travelled by that vehicle.2) average speed= total distance travelled /total time taken =6km+4km/2hr+3hr=10km/5hr----->i=2km/hr3)from i...we have...total distance travelled is 10 km

Odometer Measurement

The odometer of an automobile measures the total distance that the vehicle has traveled since it was first put into use. It is a mechanical or electronic device located on the dashboard of the car and is used to keep track of the mileage.

Calculating Average Speed and Total Distance

To calculate the average speed and total distance moved by the girl, we need to consider the two different speeds and the time taken at each speed.

Given:
First Speed (v1) = 6 km/h
Time taken at the first speed (t1) = 2 hours
Second Speed (v2) = 4 km/h
Time taken at the second speed (t2) = 3 hours

Calculating Average Speed:

To find the average speed, we can use the formula: Average Speed = Total Distance / Total Time

We first need to calculate the total distance traveled at each speed and then add them together to get the total distance.

Distance at the first speed (d1) = v1 * t1 = 6 km/h * 2 h = 12 km
Distance at the second speed (d2) = v2 * t2 = 4 km/h * 3 h = 12 km

Total Distance = d1 + d2 = 12 km + 12 km = 24 km

Total Time = t1 + t2 = 2 h + 3 h = 5 h

Average Speed = Total Distance / Total Time = 24 km / 5 h = 4.8 km/h

Therefore, the average speed of the girl is 4.8 km/h.

Calculating Total Distance:

The total distance moved by the girl is obtained by summing up the distances at each speed.

Total Distance = d1 + d2 = 12 km + 12 km = 24 km

Therefore, the total distance moved by the girl is 24 km.

Summary:

- The odometer of an automobile measures the total distance traveled by the vehicle.
- To calculate the average speed, we use the formula: Average Speed = Total Distance / Total Time.
- The girl moved with a speed of 6 km/h for 2 hours, covering a distance of 12 km.
- She then moved with a speed of 4 km/h for 3 hours, covering another distance of 12 km.
- The total distance moved by the girl is 24 km.
- The total time taken is 5 hours.
- Therefore, the average speed of the girl is 4.8 km/h.