Question
A boat travels 36 km upstream and 48 km downstream in 8
hours. If the speed of the stream is 3 km/h and the boat’s speed in still water is 9 km/h, what is the time taken for the boat to travel 36 km downstream?Solution
Speed downstream = 9 + 3 = 12 km/h Time to travel 36 km downstream = 36 / 12 = 3 hours. Correct Option: b) 3 hours
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b.     Cocci usually are ...
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