A covers 1/3rd of his journey at the speed of 10 km/h and half of the rest at the speed of 20 km/h and rest at the speed of 30 km/h.What is the average speed of A?

A covers 1/3 rd of his journey at the speed of 10 km/h and half of the rest at the speed of 20 km/h and rest at the speed of 30 km/h. What is the average speed of A?

A covers 1/4th of his journey at 20 km/h and 1/3rd of the rest at 25 km/h and half of the rest at 30 km/h and rest at the speed of 40 km/h.What is the average speed of A?

A covers 1/4 th of his journey at 20 km/h and 1/3 rd of the rest at 25 km/h and half of the rest at 30 km/h and rest at the speed of 40 km/h. What is the average speed of A?

A man covered half of the distance at 3x km/h and rest at the 5x km/h.What is the average speed of man?

A boat travels upstream at the speed of 20 km/h and downstream at the speed of 30 km/h. What is the speed of the boat.

Udai travels half of his journey by train at the speed of 120 km/h and rest half by car at 80 km/h. What is the average speed ?

A car travels a distance of 75km at the speed of 25km/h.It covers the next 25 km of its journey at the speed of 5km/h and the last 50 km of its journey at the speed of 25km/h. What is the average speed of the car?