Question
A boatman rows 2 km in 5 minutes, along the stream and
12 km in 3 hours against the stream. The speed of the stream is:Solution
Rate downstream = 2/5 x 60 = 24 km/hr Rate upstream = 12/3 = 4 km/hr Speed of current = 1/2 (Rate downstream – Rate upstream) ⇒ 1/2 (24 – 4) km/hr = 10 km/hr
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