J&'LMN)\r(4) ELMN?@PQp102\n0;<34MN?@PQ\rp&'\n)\r2RSTU5 ?0V 4. 5 ?0W 2. 8 ?0XYZ?@p4. 8\r(1) [\];ST^_YN`0a'b[\]&P?\r@)(10c)\r( 2 ) \]d0edE\nfgh0.4i0ejdked\r'fj0Ob[&'igh)\r4.\r( 3 ) fl?mno>pqT0rb[&'s)rb[&'??\r4 ?/s 8 ?/s 3 0 ?/s\r25cmX 25cm 50cmX 50cm 80cm X 80cm\r+ , - t\r1R\r1 4000 u?=40\r40X 5 X 40X 4 =32000\nv\r2 32000w28%=8960\nv\r3 5 X 3 X 4 X 2 + 6 X 2 X 4 X 2 = 2 1 6 Lv\r4 216 X 102=22032\nv\r2.\r1 5X 4. 5+5X 2. 8+4. 5X2. 8 X 2- 4. 8=70. 9\nv\r2 70. 9X [O .4 + O .4X xy tvy49. 63 xiv\r3 5X4. 5=22. 5\n=225000\nu?v\r225000 -? 25 X 25 =360 xsv\r360X4=1440?v\r2250004- 50X50 =90sv\r90X8=720?v\r2250004- 80X80z 36sv\r36X30=1080?v
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