a boat covers 56 km upstream in 7 hours and 48 km downstream in 4 hours. What is the speed of boat in still water?
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ਰੋਪੋਸੋ ਐਪ 'ਤੇ Simran Kalsi ਦੀ ਪੋਸਟ ਵੇਖੋ joban
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