Question

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

Answer 1

Answer:

50 kmh^-1, 13.89 ms^-1

Explanation:

Odometer read(at the beginning) = 2000km

Odometer read(at the end) = 2400km

Distance travelled = 2400 - 2000

                               = 400km

Time taken = 8 hours

Speed = Distance/Time

S = s/t

  = 400/8

  = 50 kmh^-1

1kmh^-1 = 5/18 ms^-1

∴ 50 kmh^-1 = 50 × 5/18

                    = 250/18

                    = 13.89 ms^-1

∴ The average speed of the total journey is 50 kmh^-1 and 13.89 ms^-1.

Hope this helps :)