Question

a car move with a speed of 30 km per hour for half an hour 25 km per hour for 1 hour and 40 kilometre per hour for 2 hours calculate the average speed of car

Answer 1

speed
$speed = 30 \times.50 = 15 \\ 25 \times 1 = 25 \\ 40 \times 2 = 80 \\ speed = 120 \times 3.50 = \\ 34.28kmh$