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10. Luas 1 = 16x16 = 256Luas 2 = 5 x 5 = 25
L1+L2 + 256 + 25 = 281 m2 (d)
11. 1/6 = 0,16 ; 20% = 0,2 ; 1/4 = 0,25 ; 0,5 ; 0,62 (a)