lizzyhearts
27.11.2019 •
Mathematics
The current in a stream moves at a speed of 10 km/h. a boat travels 31 km upstream and 31 km downstream in a total time of 3 hr. what is the speed of the boat in still water?
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Ответ:
A) -1.026x2 + 1016.402x - 162075
Step-by-step explanation: I aced the test on e2020 ;)