Перший робітник за 6 годин виготовив 28 деталей. Скільки деталей виготовив другий робітник за З години, якщо робітники працюють з однаковою продуктивністю?

New Year  is a very popular family holiday in Russia. It is celebrated on January 1. Now all Russians don’t work from the 31th of December to the 8th of January. It is so called winter holidays.  The most popular New Year symbols is a New Year's Tree. You can see a lot of decorated trees in streets and in every house. Another popular tradition is the arrival of Father Frost and his granddaughter the snow girl. They bring in New Year presents for the good children and keep them under the New Year's Tree. Children tell poems  to get a present. The main New Year celebrations begin from night of December 31.
At this holiday every  family tries to  get-together, use of fireworks,  eat delicious meals etc. They drink  champagne, eat the traditional salad Olivje, listen to the New Year Speech of the President. All people are happy. People in Russia like this holiday.