area of rhombus is given by:
[tex] Area=\frac{pq}{2} [/tex]
where p and q are diagonals of rhombus
In a rhombus diagonals bisect each other.
so if KN=13.7
KM = 2KN
KM =2(13.7) = 27.4
[tex] Area=\frac{JL*KM}{2} [/tex]
[tex] Area=\frac{13.7 * 30.8}{2} [/tex]
Area = 421.96/2=210.98
Answer : Area of rhombus =210.98