Alloy A contains copper and zinc in the ratio of 4: 3 and alloy B contains copper and zinc in the ratio 5:2. A and B are taken in the ratio

Alloy A contains copper and zinc in the ratio of 4: 3 and alloy B contains copper and zinc in the ratio 5:2. A and B are taken in the ratio of 5: 7 and melted to form a new alloy. The percentage of zinc is the new alloy as closest to

(a) 34.5%

(b) 35%

(c) 35.5%

(d) 36%

Sol:

Required percentage = 34.52%