A motorboat is going north at a speed of 25 km/hr and the flow of water in that area is south...

A car travels a distance of 45 km at a speed of 15 km/hr. It covers the next 50 km of its journey at the speed of 25 km/hr and the last 25 km of its journey at the speed of 15 km/hr. What is the average speed of the car?

Some persons hired a boat for 3 hours. The river flows at a speed of 2.5km/hr and the speed of the boat is 7.5km/hr relative to the water. They start from the port rowing along the river flow and they want to be back in 3 hrs. Find the value of a if distance travelled by them is (4+a) km.

Some persons hired a boat for 3 hours. The river flows at a speed of 2.5km/hr and the speed of the boat is 7.5km/hr relative to the water. They start from the port rowing along the river flow and they want to be back in 3hrs.Find the value of a if distance travelled by them is (4+a)km

A bird is flying with a speed of 40 km/hr. in the north direction. A train is moving with a speed of 40km/hr. in the west direction. A passenger sitting in the train will see the bird moving with velocity:-