Find the Dimensions of the Rectangle Meeting the Specified Condition

Multiple Choice

Find the dimensions of the rectangle meeting the specified condition. ​
The perimeter is 30.6 millimeters and the length is 2.4 times the width.
​

A) 10.8 mm × 8.5 mm
B) 12.8 mm × 4.5 mm
C) 10.8 mm × 4.5 mm
D) 14.8 mm × 8.5 mm
E) 12.8 mm × 6.5 mm