Question

The ratios of copper to zinc in alloys A and B are 3 : 4 and 5 : 9 respectively. A and B are taken in the ratio 2 : 3 and melted to form a new alloy C. What is the ratio of copper to zinc in C?

पर्याय

• 8 : 13

• 3 : 5

• 9 : 11

• 27 : 43

Answer 1

27 : 43

Explanation:

`c/z = ((2 xx 3)/7 + (3 xx 5)/14)/((2 xx 4)/7 + (3 xx 9)/14)`

= `(12 + 15)/(16 + 27)`

= `27/43`