Question

Example 8.2 The odometer of a car reads
2000 km at the start of a trip and
2400 km at the end of the trip. If the
trip took 8 h, calculate the average
speed of the car in km h- and ms.​

Answer 1

Answer:

50km/h or 13.88m/s should be the average speed of car

Answer 2

$\mathfrak{\huge{\red{\underline{\underline{Answer}}}}}$

Distance covered by the car,

$s = 2400km - 2000km = 400km$

Time elapsed,

$t = 8h$

$v_{am} = \dfrac{s}{t} = \dfrac{400km}{8h}$

$50kmh^{ - 1}$

$= 50 \dfrac{km}{h} \times \dfrac{1000m}{1km} \times \dfrac{1h}{3600s}$

$= 13.9 \: ms^{ - 1}$

The average speed of the car is 50 km h-¹ or 13.9 m s-¹

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