The proportion of zinc and copper in a brass piece is 4:5, respectivel – McqOptions

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1.	The proportion of zinc and copper in a brass piece is 4:5, respectively. How much zinc will be there in 180 kg of such a piece?
A.	40 kg
B.	80 kg
C.	10 kg
D.	120 kg
Answer» C. 10 kg

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