An alloy is to contain copper and zinc in the ratio 9:4. The zinc required to be melted with 24kg of copper is?
Select the correct option:
A) 12kg
B) 8.3kg
C) 10.7kg
D) 15.5kg
E) 7kg
Let the required quantity of copper be x kg   9:4::24:x   9x = 4*24   x = 10 2/3 kg = 32/3 = 10.7kg   Answer is 10.7kg
<result>C</result>
An alloy is to contain copper and zinc in the ratio 9:4. The zinc required to be melted with 24kg of copper is?