Select the Correct Alternative a Boy Goes from His House to School by Bus at a Speed of 20 Km H_1 and Returns Back Through the Same Route at a Speed of 30 Km H_1. the Average Speed of His Journey Is. - Physics
Select the correct alternative
A boy goes from his house to school by bus at a speed of 20 km h_1 and returns back through the same route at a speed of 30 km h_1. The average speed of his journey is.