A boat goes 12 km downstream and returns moving upstream to same spot after 4 1/2 hours. The speed of the current is 2 km/h. Find the speed of the boat in still water.
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Answer:
Given;
distance of downstream = 28 km
time for downstream = 4 hours
distance of upstream = 12 km
time for upstream = 6 hours
Speed in still water ;
28/4 + 12/6 = 168 + 48 /24
216/24 = 9
answer is 9 km/hrs
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