Question

If the odometer on the car reads 25 km at the beginning of a trip and 65 km a half hour later, what is the average speed of the car?

Answer 1

Add the speeds, then divide by 2.

Answer 2

Distance driven during half an hour is 65 - 25 km.
\[v = s/t = 40 km / 0,5 h\]

Answer 3

I must be brain dead haha.

Answer 4

Just look for units, no need any conversion in time and distance.

Answer 5

80 km/hour