The width of Sudha's garden is \[\frac{2}{3}\] of its length. If its perimeter is \[40\text{ }m,\] find its dimensions.

• A.  length \[=12\text{ }m\] and breadth \[=8\text{ }m\]
• B.                         length \[=8\text{ }m\] and breadth \[=12\text{ }m\]
• C.                         length \[=12\text{ }m\] and breadth \[=6\text{ }m\]
• D.                         length \[=8\text{ }m\] and breadth \[=4\text{ }m\]