Какой объем воздуха потребуется, чтобы сжечь 50 м3 газа, содержащего 90% метана, 5% этана. 3% оксида углерода (IV) и 2% азота?

As I was in London with my family, first we thought :"we have to visit the sight seen attractions) but in a time we fond a really great street with all brends. We went into the shops , tryed lot of things on , bought a lot , gave so much money away! In the end of the week that we've spent in London , we hat 2 times more baggage da we flu to London... I liked it)