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x 2400 : speed cannot be negativeloriginal speed2400 kmph., original duration of the flightdistancespeed60002400 hrs 2hrsA motorboat whose speed in still water is 5 km/hr, takes 1 hourmore to go 12 km upstream than to return downstream to the samespot. Find the speed of the stream.CBSE 2009CSpeed of the motorboat in still water-5 km/hr.Let the speed of the stream be x km/hr.Then, speed upstream (5- x) km/hr.Speed downstream- (5+x) km/hr.Time taken to go 12 km upstreamhrs.(5-x) |
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