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Abdul, while driving to school, computes...

Abdul, while driving to school, computes the average speed for his trip to be 20 km `h^(-1)`. On his return trip along the same route, there is less traffic and the average speed 30 km `h^(-1)`. What is the average speed for Abdul's trip?

Text Solution

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Average speed 20 km/h
Total distance = 2x
Average speed = `(2x xx 60)/(5x)`=24 km/h
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