Help please! 1) Corn busy 630 hectares that makes seven ninth areas of all field. Determine the area of the field. 2) The area of the field of 630 hectares, from them the seven ninth are busy with potatoes. Determine the area busy by potatoes. 3) In the first day Olya read 36% of the book, and in the second five eighth residues then it needed to read 48 pages. How many pages in the book?

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1) There will be 4900000m2 2) 900000m2 3) 200strtak write down 1) 2) (630:9) *7=490 hectares 3) ask (630:7) *9=810 hectares others I do not know
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Answer add