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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?

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? Correct Answer 80 kg

Given:

The proportion of zinc and copper in a brass piece is 4:5, respectively

Concept Used: 

If two things are in the proportion a : b respectively, then the quantity of First thing = a/(a + b) × total quantity

Calculation:

Let the required quantity of zinc be 'x' kg.

⇒ x = 4/9 × 180 

⇒ x = 80 kg  

∴ required quantity of zinc = 80 kg

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