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According to Lindeman’s law only 10% energy is transferred to higher trophic level and the rest 90% is lost.
What is the speed of boat in still water?
Statement I: It takes the boat thrice as much time to row up than as to row down the same distance in...
A swimmer can swim at a speed of 3.5 kilometers per hour in still water. If the time taken to cover a certain distance upstream is 2.5 times the time ta...
Speed of a Motorboat in still water is 75kmph. If the motorboat travels 150 km along the stream in 1 hour 40 minutes, then the time taken by it to cover...
A boat can cover 60 km in still water and 75 km in downstream in 4 hours and 3 hours respectively. Find the time taken by the boat to cover 60 km upstre...
The combined speeds of boats 'P' and 'Q' in still water amount to 52 km/hr. The current's speed affecting boat 'P' is 25% greater than that affecting bo...
A boat can travel 18 km downstream in 2 hours and 12 km upstream in 3 hours. What is the speed of the boat in still water?
A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 5 hour to row to a place and come back, how far is the place?
A boat takes 3 hours to travel 24 km downstream and 4 hours to travel 16 km upstream. What is the speed of the current?
A man can row at a speed of 64 km/h in still water to a certain upstream point and back to the starting point in a river which flows at 8 km/h. Find his...
A boat can travel 45 km downstream in 50 min. The ratio of the speed of the boat in still water to the speed of the stream is 5: 4. How much time will t...