September 2018 1 183 Report
Sebuah kapal bergerak di air tenang dgn kecepatan 25 mil/jam. kapal dapat menempuh jarak 4,2 mil di sungai dgn arah yg berlawanan arus dan dalam waktu yg sama kapal dpt menempuh 5,8 mil searah arus . kecepatan arus sungai adalah... mil/jam
a 10
b. 8.
c. 6
d. 4.
e.2
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