Rosa's Riddle: 8 ingots

[prof]

That's right. After all, the question said 'how many can she carry out of the room'. Rosa only has to take one step out of the room to carry it out!
Nice going, Ange! All those puzzles have really warmed you up good.
That's right. To do 7 trips you need 56 minutes. There are only 4 minutes left. However, you can make it back to the underground room in 3 minutes, then 'carry out' the eighth ingot in the last minute.
Kihihihihihi... Not bad, Ange! Nice one, uu!
I'm not gonna lose to you, Maria!
Congratulations. Here's my medal. Now you can try the puzzle Maria picked out just for you.