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Let, the speed of the current be x km/hr Therefore, speed of the boat in still water = 1.25x km/hr Downstream speed of the boat = x + 1.25x = 2.25x km/hr For I: 2.25x = 810/10 => 2.25x = 81 => x = 36 Therefore, speed of boat in still water = 1.25x = 45 km/hr Therefore, I is True. For II: 2.25x = 810/15 => 2.25x = 54 => x = 24 Therefore, speed of boat in still water = 1.25x = 30 km/hr Therefore, II is true. For III: 2.25x = 810/12 => 2.25x = 67.5 => x = 30 Therefore, speed of the boat in still water = 1.25x = 37.5 km/hr Therefore, III is false.
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A vessel initially contains a mixture of juice and water in the ratio of 5:3. From this mixture, 40 ml is removed, and then 25 ml of water and 25 ml of ...
In a mixture of juice & water, 60 litres water is mixed due to which ratio changes from 3:4 to 1:2. Find initial quantity of mixture. (in lit...
