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ATQ, For Boat A, Downstream Speed : Upstream Speed = 3x : 2x = 3 : 2 For Boat B, Downstream Speed : Upstream Speed = 5y : 3y = 5 : 3 For Boat C, Downstream Speed : Upstream Speed = 7z : 5z = 7 : 5 Quantity I, For Boat A, Downstream Speed = 3a km/hr Upstream Speed = 2a km/hr 144/3a + 144/2a = 20 48/a + 72/a = 20 120/a = 20 a = 6 Speed of Boat A in still water = (3a + 2a)/2 = 5a/2 = 2.5 × 6 = 15 km/hr Quantity II, For Boat B, Downstream Speed = 5b km/hr Upstream Speed = 3b km/hr 150/5b + 150/3b = 16 30/b + 50/b = 16 80/b = 16 b = 5 Speed of Boat b in still water = (5b + 3b)/2 = 8b/2 = 4 × 5 = 20 km/hr Quantity III, For Boat C, Downstream Speed = 7c km/hr Upstream Speed = 5c km/hr 140/7c + 140/5c = 12 20/c + 28/c = 12 48/c = 12 c = 4 Speed of Boat C in still water = (7c + 5c)/2 = 12c/2 = 6 × 4 = 24 km/hr Quantity I < Quantity II < Quantity III
A man can row at 36 km/hr in still water. In a stream which is flowing at 12 km/hr, it takes him 3 hrs to a place and back. How far is the place?
Speed of current is equal to 35% of speed of boat in still water. If the boat takes 7 hours to cover 140 km in still water, then find the time taken by ...
If the sum of upstream and downstream speed is 30 km/hr and the speed of the current is 6 km/hr. Then find time taken to cover 84 km in downward?
A boat can travel 26 km downstream in 30 min. The ratio of the speed of the boat in still water to the speed of the stream is 8: 5. How much time will t...
A boy can swim in water with a speed of 15 km/hr in still water. If the speed of the stream is 5 km/hr, what will be the time taken by the boy to cover ...
A boat goes 60 km in upstream in 5 hours and takes 3 hours to complete a distance of 12 km in downstream. Find the speed of boat in still water.
The speed of boat downstream and upstream is 32 km/hr and 24 km/hr respectively. Time taken to travel a distance of (d + 55) km downstream and (e + 35) ...
A boat, whose speed in still water is 25% more than the speed of the current, covers 810 km downstream in _____ hours. The speed of the boat in still w...
A man can row 16 km/hr in still water. It takes him thrice as long to row up as to row down the river. Find the speed of the man against the current.