Question

the odometer of a car reads 2000km at the starting of the trip and 2400km at end. if the trip took 8h calculate the average speed of car in km h-1 and m s-1​

Answer 1

2000+2400=4400

4400/8=550km/h

2000000+2400000=4400000

4400000/28800=153m/s

Answer 2

The odometer is a device, which shows the total distance travelled by the automobile.

_______________________

$\tt{\underline{Known\:Terms:-}}$

s = speed

d = distance

t = Time

______________________

$\tt{\underline{Given:-}}$

d = 2400 - 2000 = 400km

t = 8 hours

s = ?

____________________

$\boxed{\bf{Speed={\frac{Distance}{Time}}}}$

Using the formula, we get

s = $\frac{400}{8}$ = 50km/h

In ${ms^{-1}}$

$\frac{50\times 1000}{3600}$ = ${13.889ms^{-1}}$