лампы мощность 50 и 100 Вт рассчитаны на одинаковое напряжение.У какой лампы сопротивление нити канала больше?

ПОМОГИТЕ ПОЖАЛУЙСТА!!!!
НАЙДИТЕ НЕИЗВЕСТНЫЕ ЧЛЕНЫ ПРОПОРЦИИ:
х:20=6,2:31;        9,6:х=8,4:0,7;

Исправьте ошибки:

1. I have not seen Moskva river yet

2.Would you like to go to the South Africa in May?

3.London is a very large city. It is one of the largest citys in the world.

4. It usually take me ten minutes to get to school.

5. It will takes you an hour to get to the museum.

6. It takes us two hous to decorate the room last year.

7. I am sure it will take you a hour to write this exercise.

8. It does not takes him long to learn new words.

9. It did not took them much time to open the door.

10.He is ready. It has took him five minutes to wash up.

11. St Petersburg is one of the most beautiful city in the world.

12. There are a lot of beautiful old churchs in Suzdal.

13. Mary likes to do the shopping in the OxfordStreet.

14.I never was in India.

15. Nick already saw the film

16. Tom has not already seen the film.

17. Did you ever buy clothes?

18.My aunt has never work in a hospital.

19. They have visited Mrs Spencer two days ago.

20. They just saw their teacher.

квартира состоит из 3 комнат.первая комната на 5 м2 меньше второй, а вторая на 8 м2 меньше третей.найдите общую площадь трех комнат, если площадь самой маленькой из них равна 10 м2.