A and B are two points in a river. Point X and Y divide the line AB in three equal parts. Let the flow of the river is from A to B. The ratio of the time taken to row from point A to Y and from B to Y is 3 : 4. Find the ratio of the speed of the boat upstream to the flow of the river.

Two boys A and B start at the same time to ride from Delhi to Meerut, 60 km away. A travels 4 km an hour slower than B. B reaches Meerut and at once turns back and meets A at 12 km from Meerut. Find A's speed

A train take 15 second to cross a pole. If the speed of the train is 60 km/hr, then length of the train is:

The speed of a 90 meter long train is 45 km/h. A man is standing right next to the railway line. How much time will the train take to cross the speed increases by 20%?

Alice is faster than Bob, Alice and Bom each walk 30 km. The sum of their speeds is 8 km/hr and sum of time taken by them is 16 hours. Then Alice's speed is equal to

Two cyclists, k kilometers apart, and starting at the same time, would be together in r hours if they traveled in the same directions, but would pass each other in t hours if they travelled in opposite directions. The ratio of the speed of the faster cyclist to that of the slower is:

The speed of a bus is 72 km/hr. The distance covered by the bus in 5 second will be?