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Math Chapter Wise question with answer

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Question #52,685
Math Chapter Wise Arithmetic English MCQ DSSSB 23 SEP 2018 (9 AM-11 AM)

Q.A boat may go 12 km upstream and 15 km towards the downstream in 1 3 2 hours. It covers 9 km upstream and 5 km downstream in 2 hours. What is the speed of boat in still water in km/h?

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