It takes 5 hours for a boat to go down-stream and 10 hours to return t – McqOptions

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1.	It takes 5 hours for a boat to go down-stream and 10 hours to return to the same place against the stream. If the stream is flowing at the rate of 40 km/hour, calculate the speed of the boat.
A.	150 km/hour
B.	170 km/hour
C.	120 km/hour
D.	100 km/hour
Answer» D. 100 km/hour

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