A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is :
A. 2.5 km/hr
B. 4.2 km/hr
C. 5 km/hr
D. 10.5 km/hr
সঠিক উত্তরঃ
A.
2.5 km/hr
Explanation:
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