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In a to and fro journey between two places, the average speed of a boat was 9.1 kmph. If the upstream speed of the boat is 7 kmph, find the speed of the stream. | |
A. | 2.1 kmph [Wrong Answer] |
B. | 3 kmph [Correct Answer] |
C. | 2.9 kmph [Wrong Answer] |
D. | 3.5 kmph [Wrong Answer] |