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Transformers require a changing magnetic flux, which DC cannot provide.
Before rain a boat can cover 90 km in still water and the same distance upstream in 6 hours and 9 hours, respectively. Due to the rain the speed of the ...
A boat running downstream covers a distance of 56 km in 7 hrs and covering the same distance upstream in 14 hrs. What is the speed of a boat in still wa...
A boat can travel 10 km more in downstream than that in upstream, in 5 hours while the difference between the time taken by the same boat to travel 250 ...
The downstream speed of a boat is 6 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 ...
The speed of a boat in still water is 7 km/hr and speed of current is 3 km/hr. If time taken to cover a certain distance upstream is 10 hours, then how ...
A boat goes 65 km in upstream in 5 hours and takes 4 hours to complete a distance of 20 km in downstream. Find the speed of boat in still water.
A boat traveled 100 km downstream. The boat's speed in still water is 30 km/h, and the stream's speed is 10 km/h. Calculate the time required for the bo...
The Ship's speed in calm water exceeds that of the current by 20%. After sailing downstream for 4 hours, it traveled upstream for 4 hours with an increa...
A boat travels downstream at a speed that is (13/12) times its speed in still water. If the boat takes 3 hours to cover 132 km going upstream, how long ...
A man goes downstream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and...
