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In 1 hour, one train goes (21-16)= 5 km more than another.
Now, In 1 hour total distance covered by them = (16+21) km = 37 km
If distance difference is 5 km then total distance = 37 km
If distance difference is 60 km then total distance = km
Distance between Dhaka and Chittagong is 444 km. (ans.)
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