Answer:
Explanation:
let the speed of stream=x mi/hr
then (3+x)t=5
and (3-x)t=0.5
or
3t+xt=5
3t-xt=0.5
add
6t=5.5
t=5.5/6 hr
(3+x)t=5
3+x=5/t=5×6/5.5=6/1.1
x=6/1.1-3=(6-3.3)/1.1
x=2.7/1.1 /approx 2.45 miles/hr
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