প্রশ্ন ও উত্তর
A man can row upstream at 10 km/h and downstream at 16 km/h. His rate in still water is---
গণিত Boat and Stream 07 Oct, 2020
প্রশ্ন A man can row upstream at 10 km/h and downstream at 16 km/h. His rate in still water is---
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