A) \[71:21\]
B) \[12:11\]
C) \[31:35\]
D) \[4:7\]
Correct Answer: C
Solution :
We know that in a parallelogram opposite sides are equal. \[\therefore \] \[AB=CD\] or \[2x+5=y+1\] and \[AD=BC\] or \[y+5=3x-4\] \[2x-y=-4\] ....(i) \[y-3x=-9\] .....(ii) Adding (i) and (ii), we get \[-x=-13\]or \[x=13\]and \[y=30\]. Substituting, we have \[AB=31\text{ }cm\] and \[BC=35\text{ }cm\] \[\therefore \] The required ratio \[=31:35\]You need to login to perform this action.
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