Question

A car travels at 80km/h for 4 hours and then a speed of 100km/h for a further 2 hours .

1) Calculate the total distance travelled.
2) Calculate the average speed for the whole journey.

Answer 1

Total Distance = 520km
Average speed = 86.667km/h (to 3 decimal places).

Explanation:

80 x 4 = 320km
100 x 2 = 200km

Total distance: 320km + 200km = 520km

Average speed: 520/6(hours) = 86.666