Question 522515
let current speed = x
steamer speed = x+20

upstream speed = (x+20-x)=20 mph
downstream speed = 2x+20

upstream distance = 40
downstream distance = 58

times are same

t=d/r

40/20 = 58/(2x+20)
cross multiply
40(2x+20)=58*(20)
80x+800=1160
80x=1160-800
80x=360
x=4.5 mph

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