a boat goes 30km upstream and 44km downstream in 10hr, it can go 40km upstream and 55km downstream. determine the speed of the stream of the boat in still water.
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Answer:
a boat goes = 30 km upstream
a boat goes = 44 km downstream
in 10 hour
downstream = 44 + 55 = 99
upstream = 30 + 40 = 70
99-70 =29
29 ÷ 10 = 2.9 km is answer
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