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Only few stems are roots → Some stems are roots (I) and Some stems are not roots (O). Hence conclusion I does not follow. Some windows are stems (I) + Some stems are roots (I) → No conclusion. Hence conclusion II does not follow. No door is a window (E) + Some windows are stems (I) → Some stems are not doors (O*) → Probable conclusion → All stems may not be doors (I). Hence conclusion III does not follow.
The angle of elevation of a tower from a certain point of bus stand is 30°. When a man walks 5m ahead in the direction of the tower, the angle of el...
A boat can travel 24 km upstream and 30 km downstream in 4 hours. Find the speed of the boat in still water if the speed of the stream is 3 km/h.