A boat sailing against a stream of river takes 6 hours to travel 24 kms, while sailing with the stream it takes 4 hours to travel the same distance. What is the speed of the stream?
A. 1/2 km/hr
B. 1 km/hr
C. 2km/hr
D. 1.5 km/hr
E. 2.5 km/hr
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সঠিক উত্তরঃ
B.
1 km/hr
Explanation:
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