A car covers a distance of 80 km at a speed of 60 km/hr and another 140 km at a speed of 70 km/hr. What is the average speed of the journey ?

Deepak went on his bike from Chennai to Thiruvallur at a speed of 60 km/hr and came back at a speed of 40 km/hr. What is his average speed for entire journey.

A man at a speed of 6 km/hr for 1 km and 8 km/hr for the next 1 km. What is t his average speed for the walk of 2 km?

A car covers the first half of the distance between two places at 40 km/hr and another half at 60 km/hr. The average speed of the car is

A car travels at a speed of 60 km/hr due north and the other at a speed of 60 km/hr due east. Are the velocities equal? If no, which one is greater ? If you find any of the questions irrelevant, explain.

A bus covers a distance of 90km at a unform speed. Had the speed been 15km/hour more it would have taken 30 minutes less for the journey. Find the original speed of the bus.

A ship A which is at distance of 30km to the north of P moves at 15 km/hr and another ship B which is at a distance of 40 km to the east of P moves at 20 km/hr. How fast the distance between the cars changing?

Two vehicles leave the same place P at the same time moving along two different roads. One vehicle moves at an average speed of 60km/hr and the other vehicle moves at an average speed of 80km/hr. After half an hour the vehicle reach the destinations A and B. If AB subtends 60^(@) at the initial point. P, then find AB.

What is the average speed of the car if it covers 200 km in 5 h?