Question:An alloy is to contain copper and zinc in the ratio `9 : 4`. The zinc required (in kg) to be melted with `24` kg of copper, is ? 

A `10 2/3` 
B `10 1/3` 
C `9 2/3` 
D `9` 

+ Answer
A 

+ Explanation
`9 : 4 :: 24 : x`

`iff 9x = 4 xx 24`

`iff x = (4 xx 24)/9`

`= 10 2/3` kg.

+ Report

Md. Habib Ullah

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