The lines are more then you think they are
Answer:
Solution:
the boat's speed in still water: x
The speed with current: (x+3)
The speed against current: (x-3)
The equation is
3(x+3) = 4(x-3)
x = 21 mph
The distance = 3*(21+3)= 72 miles
I choose (A)
Step-by-step explanation:

<span>Explanation for the last step:</span>
77 because 4.9 Times 10 Times 3 equals 147 and 1.4 Times 10 Times 5 equals 70 then you would subtract 70 from 140 and get 77