Question

A car travels at a speed of 40 km per hour for 0.50 hour at 20 km per hour for the next 0.67 hours what is the average speed of the car

Answer 1

$speed = 40 \times 0.50 = 20 \\ 20 \times 0.67 = 13.4 \\ speedaverage = 33.4 \times 1.17 \\ 39.08kmh$