Question
A boat travels 30 km upstream and 45 km downstream in 6
hours. If the speed of the stream is 4 km/h and the boat’s speed in still water is 8 km/h, what is the time taken for the boat to travel 30 km upstream?Solution
Speed upstream = 8 - 4 = 4 km/h Time to travel 30 km upstream = 30 / 4 = 7.5 hours. Correct Option: b) 7.5 hours
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