a boat whose speed goes 15km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is?
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Answer:
5 km/h
Step-by-step explanation:
Let the speed of the stream be x km/h. Then,
Speed downstream = (15 + x) km/h
Speed upstream = (15 - x) km/h
So we know from question that it took 4(1/2) hrs to travel back to the same point.
So,
by using the formula you will get answer
Hope it Helped
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