Question

The odometer of the car reads 2000km at the start of the trip and 2400 km at the end of the trip if trip took 8 hrs then Calculate the average speed of the car in km/h and m/s.
​

Answer 1

Answer:

The average speed of the car is 50km/h or 13.9m/s.

Step-by-step explanation:

Given:

• Reading of the odometer in the starting of the journey = 2000km
• Reading of the odometer in the end of the journey = 2400km
• Time taken by the car = 8hour

Need to find:

• The average speed of the car in km/h and m/s.

Explanation:

Distance travelled by the car = Reading of the odometer in the end of the journey - reading of the odometer in the starting of the journey

=> 2400km - 2000km

=> 400km

Time taken by the car = 8 hours

As we know that,

Average speed of the car = total distance travelled/total time taken

=> 400/8km/h

=> 50km/h

Calculating the speed in m/s

As we know that,

1 km = 1000m

Therefore,

average speed in m/s = 50×1000/60×60

=> 13.9m/s

Hence, The average speed of the car is 50km/h or 13.9m/s.

Answer 2

$\huge \underline \mathbb {SOLUTION:-}$

Odemeter is a device which tells about the total distance covered.

• Inditial distance = 2000 Km
• Final distance = 2400 km

Distance covered = Final distance - Initial distance

➠ 2400 - 2000

➠ 400 Km

Time taken = 8 Hours

Formula used here:

• Average speed = Total distance/Total time

Putting the values according to the given formula:

➠ 400/8

➠ 50 Km/h

Now,

• Conversion from km/h to m/s

We know that:

• 1 Km = 1000m
• 1 hour = 60 minutes
• 60 minutes = 3600 Seconds

Therefore:

➠ 1km/h = 1000m/3600 seconds

Therefore:

➠ 1km/h = 5/18 m/s

Now,

• Converting speed to m/s

Speed = 50 × 5/18 m/s

➠ 250/18

➠ 13.88 m/s

$\setlength{\unitlength}{1.0 cm}}\begin{picture}(12,4)\thicklines\put(1,1){\line(1,0){6.5}}\put(1,1.1){\line(1,0){6.5}}\end{picture}$