Question:A man rows downstream 27 km and upstream 18 km, taking 3 hours each time. What is the velocity of the current ?
Answer Rate downstream` = (27/3)` km/hr = 9 km/hr Rate upstream` = (18/3)` km/hr = 6 km/hr :. Velocity of current` = 1/2 (9 - 6)` km/hr = 1.5 km/hr
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A man rows downstream 27 km and upstream 18 km, taking 3 hours each time. What is the velocity of the current ?