Zinc and copper are melted together in the ratio 9 : 11. What is the weight of melted mixture, if 28.8 kg of zinc has been consumed in it?
Choices:
A) 58 kg	B) 60 kg	C) 64 kg	D) 70 kg	E) None
Sol.   For 9 kg Zinc, mixture melted = (9+11) kg.   For 28.8 kg Zinc, mixture, melted = [20/9 x 28.8] kg   = 64 kg.   Answer 64 kg
<result>C</result>
Zinc and copper are melted together in the ratio 9 : 11. What is the weight of melted mixture, if 28.8 kg of zinc has been consumed in it?