Answer:
Step-by-step explanation:
Is this actual question?
answer is 170
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50% of 850 = 425
30% of 850 = 255
425 + 255 = 680
850 - 680 = 170
cara de culo
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89
Let the rate of boat in still water be b and the speed of the current be c
<u>We got equations for time:</u>
<u>Add up the equations:</u>
<u>Then finding the values of c</u>