Question

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 is 30Km h^-1.what is the average speed for abdul's trip?

Answer 1

Answer:

let the distance to be x km

time taken to reach school= x/20

Explanation:

further answer given in picture