Q: A boat starting from point P goes downstream to point Q in 3 hours and return back from point Q to the point P in 4 hours. If the speed of the water is 3 km/h, find the speed of the boat in still water.
A.
20 km/h
B.
32 km/h
C.
12 km/h
D.
21 km/h
Correct Answer:
Option D -
Explanations:
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