# A metal alloy weighing 11 kg and containing 2% platinum is melted and mixed with 6 kg of a different alloy which contains 36% platinum. What percent of the resulting alloy is platinum?

Jan 17, 2017

Approx. 15%

#### Explanation:

$\text{% of platinum}$ $=$ "Total mass of platinum"/"Total mass of alloy"xx100%.

(2%xx11*kg+36%xx6*kg)/(11*kg+6*kg)xx100%

=(2.38*kg)/(17*kg)xx100%=??%

The spot price for platinum is currently £25-24*g^-1. What is this lump worth?