Vijay has to go to office from home. He travels the first half of the distance at speed of 30 km/hr. For the remaining distance he travels at 10 km/hr for half the time and at 20 km/hr for the rest. Find his average speed.
Varun travelled 18 th of his journey, which is equal to 56 km, on a scooter. What is the remaining distance he has to cover?