Abdul, while driving to school, computes the average speed for his trip to be 20 kmh−1. On his return trip along the same route, there is less traffic and the average speed is 40 kmh−1. What is the average speed for Abdul’s trip?

Abdul, while driving to school, computes the average speed for his tri

1.	Abdul, while driving to school, computes the average speed for his trip to be 20 kmh−1. On his return trip along the same route, there is less traffic and the average speed is 40 kmh−1. What is the average speed for Abdul’s trip?
Answer» Abdul, while driving to school, computes the average speed for his trip to be $20 k m h^{- 1}$ . On his return trip along the same route, there is less traffic and the average speed is $40 k m h^{- 1}$ . What is the average speed for Abdul’s trip?