A motorboat can travel up to 12 km an hour along the flow. 6 km against flow and flow. Moves as much as possible. (What is the speed of this boat in stagnant quiet water?
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Step-by-step explanation:
Let x be the speed of the stream.
⇒ Speed of the boat in still water is 8km/hr
⇒ The speed of the boat in upstream is 8−xkm/hr
⇒ The speed of the boat in downstream is 8+xkm/hr
⇒ The time taken by the boat to cover 15km=
8−x
15
hr
⇒ The time taken by the boat to cover 22km=
8+x
22
hr
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