A car takes 2 hours to reach a destination by travelling at the speed of 60 km/hr.How long it take when the car travels at the speed of 80 km/hr?

The wheels of a car are of diameter 80cm each. How many complete revolutions does each wheel make in ten minutes when the car is traveling at the speed of 66km per hour?

The wheels of a car are of diameter 80 cmj each. How many complete revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour ?

In a journey, the first one - third of the distance is covered at a speed of 20km/hr, the second 1/3 at speed of 30 km/hrand the last 1/3 at a speed of 24 km/hr. The average speed in km/hr for the whole journey is

An automobile driver travels from plane to a hill station, a distance of 120 km at an average speed of 30 km per hour. He then makes the return trp at an average speed of 25 km per hour. He covers another 120 km distance on plane at an average speed of 50 km per hour. His average speed over the entire distance of 360 km will be :

OA and OB are two roads enclosing an angle of 120^(@) .X and y start from 'O' at the same time. X travels along OA with a speed of (4km)/(hour) and Y travels along OB with a speed of (3km)/(hour) .The rate at which the shortest distance between X and Y is increasing after 1 hour is

A car travelling at the speed of 30 km/hr brakes and is brought to halt in 8m.If the same car is travelling at 60 km/hr, then it can be brought to rest with the same breaking power in:

A man travels a distance of 196 km by train and returns in a car which travels at a speed of 21 km/hours more than the train if the total journey takes 11 hour. Find the average speed of the train and the car respectively.

An automobile driver travels from plane to a hill station, a distance of 120 km at an average speed of 30 km per hour. He then makes the return trip at an average speed of 25 km per hour. He covers another 120 km distance on plane at an average speed of 50 km per hour. His average speed over the entire distance of 360 km will be :

A car travels at a speed of 80 km/h during the first half of its running time and at 40 km/h during the other half. Find the average speed of the car. (60 km/h) ( AS_(7))