A car travels at a speed of 50 `km//hr` for 15 minute and then 70 `km//hr` for next 45 minutes. What is the average speed of the car?

A car travels at a speed of 50 km/hr for 30 minutes, at 30 km/hr for next 15 minutes and then 70 km/hr for next 45 minutes. What is the average speed of the car?

A car movies at a constant speed of 60 km hr^-1 for half of the journey and 80 km hr^-1 for remaining half of the journey. Find the average speed of the car in one hour.

Solve the following questions. (ii) A train travels 360 km with uniform speed. The speed of the train is increased by 5 km//hr , it takes 48 minutes less to cover the same distance. Find the initial speed of the train.

If a car travelling at 58 km/h overtakes another car travelling at 40 km/h, the relative velocity of first car with respect to another car is

A bus travel its onward journey with a constant speed of 30km//hr and its return journey with a constant speed of 60km//hr .the average speed for its entire journey is A. 90 k m / h r B. 45 k m / h r C. 40 k m / h r D. 15 k m / h r

A car moves at speed of 36 km hr^-1 on a level road. The coefficient of friction between the tyres and the road is 0.8 . The car negotiates a curve of radius R. IF g=10 ms^-2 , then the car will skid (or slip) while negotiating the curve if the value R is

A train A is travelling at a speed of 108 km hr^(-1) . The train approaches another train B standing on the platform. The engine of the train B blows its hom. The frequency of the horn as observed by the driver in train A is 504 Hz. The frequency of the hom of train B is (speed of sound = 330 ms^(-1) )