A boatman can take his boat downstream with a speed of 14 km/h and upstream with a speed
of 6 km/h. What is the speed of the flow of water in the stream?
It's answer is 4 km/h please give me the explanation correctly.
I will give you brainlist.
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Step-by-step explanation:
Sound waves are created when sounds make vibrations in the air. In this activity, your voice vibrates the air inside the cup, which are then transferred to the bottom of the cup. The bottom of the cup passes the sound waves to the string, and so on to the other cup.
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