A boat can cover 12 km in 40 minutes going in still water .if speed of stream is 2 km/hr then find the average speed of boat in still water
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5.83 metre per second
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Answer:
12 km upstream in 48 min. ⇒ it will cover 15 km in 1 hr. Speed of stream = 2 km / hr. ∴ Speed of boat in still water = 15 + 2 = 17 km / hr.
Explanation:
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