Mathematics
Mathematics, 05.04.2021 14:00, ashleymartinez147

a motorist travelled 20km at an average speed 15km/h .if he made the return journey at an average speed of 30km/h .Find the average speed of the whole journey ​

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a motorist travelled 20km at an average speed 15km/h .if he made the return journey at an average sp...

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