THE FAMILY KUZMINYKH DOES REPAIR OF KITCHEN. LENGTH OF KITCHEN 4M. WIDTH 3M. CEILING 3M HEIGHT. TWO WALLS PASTE OVER WITH WALL-PAPER. TWO OTHER WALLS TILE. THE TILE HAS THE RECTANGLE FORM WITH THE PARTIES 30CM OF I40SM. LAID OUT 25 SUCH TILES. WHAT KUKHNI SQUARE? WHAT AREA SHOULD BE PASTED OVER? WHAT AREA WAS COVERED BY THESE TILES?

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1) The area of kitchen = 4 m × 3 m = 12 square meters 2) the Area of a tile = 30 cm × 40 cm = 1200 cm square 3) the Space occupied by tiles = 1200×25=30 000 cm square = 3 m square 4) the Area obkleyany both = 12 m of quarter - 3 m of quarter = 9 sq.m. Answer: in total it is necessary to Paste over 12 m of quarter (wall-paper: 9 m of quarter; tile: 3 m of quarter)
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Answer add