A) \[7\]
B) \[9\]
C) \[12\]
D) \[29\]
Correct Answer: A
Solution :
Perimeter of the rectangle \[=60\text{ }cm\] From the figure, length is \[(3k-2)\,cm\] and breadth is \[(k+4)\,cm\] \[\therefore \] \[2\left[ (3k-2)+(k+4) \right]=60\] \[\Rightarrow \] \[2[4k+2]=60\] \[\Rightarrow \] \[4k+2=30\] \[\Rightarrow \] \[4k=28\] \[k=\frac{28}{4}=7\]You need to login to perform this action.
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