[" rovist drives from place "A" to "B" with a uniform speed of "30kmh^(-1)" and returns from place "B" to "A],[" miform speed of "20kmh^(-1)" .Find his average speed."]

A motorcyclist drives from A to B with a uniform speed of 30 km h^(-1) and returns back with a speed of 20 kmh^(-1) . Find its average speed.

A motorcyclist drives from A to B with a uniform speed of 30 km h^(-1) and returns back with a speed of 20 kmh^(-1) . Find its average speed.

For a train that travels from one station to another at a uniform speed of 40 kmh^(-1) and returns to final station at speed of 60kmh^(-1) then its average speed is

A motorcylist drives from A to B with a unit speed of 30 kmh^-1 and returns back with a of 20 kmh^-1 . Find its average speed.

A motor cyclist drive from A to B with uniform speed of 30km/hour and returns back with a speed of 20 km/hour. Find the average speed.

A man travels from Kalighat to Tarakeswar with a uniform speed of u km/h and returns from Tarakeswar to Kalighat with uniform speed of v km/h. Show that his average speed is the harmonic mean between u and v.

A train travels from station A to station B at a constant speed of 40 km. h^(-1) and returns from B to A at 60 km . h^(-1) . Find the average speed and average velocity of the train.