Average Speed

A cyclist covers his first 20 km at an average speed of 40 kmph, another 10 km at an average speed of 10 kmph and the last 30 km at an average speed of 40 kmph. Then the average speed of the entire journey is

Explain with example the distinction between the magnitude of average velocity and average speed over the same period. Show that and the average speed is either greater than or equal to the average velocity. When is the equality sign true?

Usually average speed means the rationof total distace travelled to the total time elapsed. However, sometimes thephrase average speed can vean the magnitude of the average velocity. Are the two same ? Discuss.

A cyclist moves non-stop from A to B, a distance of 14 km, at a certain average speed. If his average speed reduces by 1 km per hour, he takes 20 minutes more to cover the same distance. The original average speed of the cyclist is

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 ?

During the first 18 min of a 60 min trip, a car has an average speed of 11 ms^-1. What should be the average speed for remaining 42 min so that car is having an average speed of 21 ms^-1 for the entire trip?

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 30 km h^(-1) . What is the average speed for Abduls trip ?