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Answer:
54 cm sq.
Step-by-step explanation:
let longer diagonal be 4x=12
smaller diagonal be 3x
4x=12
x=12/4 =3
3x=3×3
=9
Area of rhombus = 1/2 diagonalA×diagonalB
= 1/2 × 9×12
= 54 cm sq.
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