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Some petrol are coal (I) → Conversion → Some coal are petrol (I) + All petrol are diesel (A) → Some coal are diesel (I) + Some diesel are kerosene (I) → Probable conclusion → All coal can be kerosene (I). Hence conclusion I follows. Some petrol are coal (I) → Conversion → Some coal are petrol (I) + All petrol are diesel (A) → Some coal are diesel (I) → Probable conclusion → All coal can be diesel (I). Hence conclusion II follows. All petrol are diesel (A) → Probable conclusion → All diesel can be petrol (I). Hence conclusion III follows. Alternate Method -
A boat covers a distance of 150 km while moving in a downstream in 5 hours. When the boat covers a distance of 60 km in still water in 3 hours, then Wha...
The ratio of the distances traveled by a boat in upstream and downstream is 6:7, respectively, and the total time taken to cover the desired distance is...
A man can go on a motor boat with a speed of 15 km/hour in still water to a certain upstream point and come back to the starting point in a river which ...
Speed of a boat in still water is three times the speed of the boat in upstream. If the boat takes 35 minutes to cover 35 km in downstream, then find th...
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 Passenger boat started its journey from point A to B .After sometime when it is 156 km away from point B it is started to get sinking and passengers...
A boat takes 270 minutes to travel 90 km in upstream. The same boat in the same stream takes 120 minutes to travel 50 km in downstream. Find the distanc...
Determine the speed of a Ship in calm water, given that the Ship's speed downstream is 20% greater than its speed in still water. If the Ship can cover ...
Two boats X and Y start towards each other from two places, 119 km apart. Speed of the boat X and Y in still water are 7 km/hr and 10 km/hr respectively...
A boy can swim a certain distance downstream in 6 hours and return in 7 hours. If the rate of stream is 3 kmph then what is the speed of boy in still wa...