Question

In an alloy, the ratio of copper and zinc is 5:2.If 1.250 kg of zinc ia mixeed with 17 kg 50p g of alloy, then find the new ratio of copper and zinc

Answer 1

Cu : Zn =5 : 2 = 5x :2x

5x+2x= 17.5 kg

7x =17.5

x = 2.5 Kg

cu =2.5*5=12.5 kg

zn= 2x=2*2.5=5 kg

adding 1.25 kg zn will cause

Cu: Zn= 12.5:(5+1.25)= 12.5:6.25=2:1