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8.	At what speed will the velocity head of stream of water be 40 cm?
	A.	2.80cms^-1
	B.	280 cms^-1
	C.	28 cms^-1
	D.	0.280 cms^-1

	Answer: Option B


	Explanation:
	h=v²/2g v=√2gh=√(2×980×40)=280cms^-1.



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Published by:Michael Daani

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