Question
Why does a solid chunk of iron float in mercury but sink
in water?Solution
Iron sinks in water due to its higher density compared to water but floats in mercury because mercury's density is greater than that of iron. This property of relative density determines whether substances float or sink in different mediums.
The time taken by a boat to travel 'd' kilometers downstream is 8 hours, while the time taken to travel (d - 60) kilometers upstr...
A boat’s speed in still water is 1.5 times the speed of the current. It takes the boat 22.5 hours to travel 90 km upstream. If ...
A car has to cover a distance of 240 km in 30 hours. If it covers half of the journey in 3/5 th of the time, the speed to cover the remainin...
The downstream speed of a boat is 4 km/hr more than its upstream speed and the ratio of the speed of the boat in still water to the speed of the stream ...
A boat has a speed of 52 km/h in still water. It takes 8 hours to travel from point B to point A downstream. The total distance between the two points ...
A boat can travel 42 km downstream in 60 min. The ratio of the speed of the boat in still water to the speed of the stream is 5: 2. How much time will t...
A boat travels 200 km downstream in 10 hours. The difference between its downstream speed and upstream speed is 5 km/h. What is the ratio of the boat's ...
The speed of boat downstream and upstream is 36 km/hr and 26 km/hr respectively. Time taken to travel a distance of (k + 60) km downstream and (l + 40) ...
The ratio of the speed of boat ‘A’ in still water, the speed of boat ‘B’ in still water and the speed of the current is 7:5:2, respectively. If ...
A boat takes 24 hours to cover 'q' km in still water. While traveling downstream, it takes 16 hours to cover (q - 80) km. If the speed of the boat in st...