Question

a car odometer reads 22687km at the start of a trip and 22791 at the end of the trip. if the trip takes 4hours then the average speed of the car in kmph and ms-1

Answer 1

26 km/h
7.21 m/s

speed = distance / time
hence (22791-22687)/4=24 km/h
now convert the unit and you'll get 7.22222222...... hence 7.21

Answer 2

Answer:

The average speed of the car is kmph and $ms^{-1}$ is $7.22 \mathrm{~ms}^{-1}$.

Step-by-step explanation:

The average speed exists the entire distance traveled by the object in a certain time interval. The average speed exists as a scalar quantity.

We know that,

Average speed = Total Distance traveled \ Total time taken

Average speed $=\frac{22791-22687}{4} \mathrm{kmh}^{-1}$

$=\frac{104}{4} \mathrm{kmh}^{-1}$

$=26 \mathrm{kmh}^{-1}$

To convert speed from km/h to m/s, multiply it with $\frac{5}{18}$.

$v_{\text {Avg }}=26 \times \frac{5}{18} \mathrm{~ms}^{-1}$

$=7.22 \mathrm{~ms}^{-1}$.

Therefore, the average speed of the car is kmph and $ms^{-1}$ is $7.22 \mathrm{~ms}^{-1}$.

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