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A motar boat has a speed of 15 km per hour in still water the motar boat goes 30 km downstream at coens back in a total of 4 hours and 30 minutes the speed of the current river is |
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Answer» : The speed of the current of the river is 5km/h Given : The speed of the motor in still water is 15km/h The motor boat GOES 30km downstream and comes back in a TOTAL of 4 hours 30MINS or 4.5 hours Solution : Let us consider the speed of the current of river be x km/h The speed of the bo boat in downstream is (15 +x) km/h and the speed at UPSTREAM is (15 - x)km/hNow The time TAKEN to go upstreamSimilarly , time taken to go downstreamThe speed of the river current is 5km/h |
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