You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed over the 12 km drive will be

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Quizplus · Accepted Answer

The average speed for the entire trip is calculated by dividing the total distance by the total time. For the first 6.0 km at 50 km/h, it takes 6/50 hours. For the next 6.0 km at 90 km/h, it takes 6/90 hours. The total time is the sum of these, and the average speed is the total distance (12 km) divided by this total time. This calculation will result in an average speed less than 70 km/h, as the time taken for the slower segment disproportionately affects the average speed.

You Drive 6