A jeweler has 5 rings each weighing 16g made of an alloy of 10% silver and 90% gold. She decides to melt down the rings and add enough silver to reduce the gold content to 75% how much silver should she add? Stan and Hilda can mow the lawn in 60 min if they work together. If Hilda works twice as fast as Stan how long does it take Stan to mow the lawn alone?

Answer rating: 100% (QA)

1 To determine how much silver the jeweler should add to the alloy we can approach it as a mixture p... View the full answer