A boy rides his bicycle 10 km at an average speed of 12 km/hr and travells 12 km at an average speed of 10 km/hr. His av…

The speed of a motor-boat is that of the current of water as 36:5. The boat goes along with the current in 5 hours 10 mi…

A car after traveling 18 km from a point A developed some problem in the engine and the speed became $$\frac{4}{5}$$ th …

Two trains start from a certain place on two parallel tracks in the same direction. The speed of the trains are 45 km/hr…

A certain distance is covered at a certain speed. If half of this distance is covered in double the time, the ratio of t…

A 120 metres long train is running at a speed of 90 km per hour. It will cross a railway platform 230 m long in ?

Narayan walking at a speed of 20 km/h reaches his college 10 minutes late. Next time he increases his speed by 5 km/h, b…

Two trains 150 m and 120 m long respectively moving from opposite direction cross each other in 10 sec. If the speed of …