11. B.3x2
12. B. (4x + 36) cm
13. D. (2x - 5) meters
14. A. (5ab) meters & B. (3x + 4y) cm
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11. B.3x2
12. B. (4x + 36) cm
13. D. (2x - 5) meters
14. A. (5ab) meters & B. (3x + 4y) cm