60 листов имеют толщину 1см. Какова толщина книг, если в ней 420 страниц,а толщина обложки равна 5мм?

(Что делает)(кто?)(какой?).    (Какое?)(что?)(что делает?). (Какие?)(кто?)и(кто?)(что делает?).

Английский язык 7 класс 
A lot of British school children do something for charity. Here are what they say about what they do.

Put the article /the/ where necessary.

1.I think  helping ___ (1) elderly people is necessary . I help ____ (2) elderly people at ___ (3) local nursing home.

2. I volunteer at local RSPCA . I help to feed _____ (4) animals and clean ___ (5) cages 

3. My friends and i support ___ (6) needy children in poor countries . We provide them with ____ (7) food and ____ (8)

4. At my school we collected ___ (9) clothes for UNICEF . ___ (10) clothes went to ____ (10) children in need.

5. My school raises ___ (11) money for ___ (12) charity. Then we donated ___ (13) money to different charities.