Question P6 An average is a total
Today’s problem — free all day, every step. Every day has one.
Priya cycles from her house to the library at 12 km/h and cycles back home at 8 km/h. The library is 24 km away. What is her average speed for the whole trip?
Answer
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Turn the average back into a total before doing anything with it.
In this one. Average speed is total distance divided by total time, not the average of the two speeds, because the slower return leg takes longer.
The word 'average' appears alongside a group being split into two parts, or two separate journeys or trips being combined into one overall figure.
Children average two averages directly, such as averaging two speeds or two group averages, without weighting by how many, or how long, each part actually covers.
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