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1. |
A boat while dowenstream in a reiver converda distance of 50 miles at an average speed of 60 miles per hour. While returning , because of the water resistance , it took 1 hour 15 minutes to cover the same distance What was the average speed during the whole journey? |
A. | 0 mph |
B. | 8 mph |
C. | 0 mph |
D. | 5 mph |
Answer» C. 0 mph | |