The smaller of two similar rectangles has dimensions 4 and 6. Find the dimensions of the larger rectangle if the ratio of the perimeters is 2 to 3.

2 2/3 by 4
6 by 9
8 by 18
12 by 12

Question

The smaller of two similar rectangles has dimensions 4 and 6. Find the dimensions of the larger rectangle if the ratio of the perimeters is 2 to 3.


2 2/3 by 4
6 by 9
8 by 18
12 by 12

anonymous · Answer

The perimeter of the smaller rectangle is 2(6)+2(4) = 20
The ratio between the two rectangles is 2:3

2/3 = 20/x  Solve the ratio and you have the perimeter of the larger rectangle.

anonymous · Answer

oh okay I get it xD thanks

anonymous · Answer

Perimeter = 30...dimensions will be 2:3   
6/x = 2/3
4/x = 2/3                  solve these ratios and you'll have the dimensions

anonymous · Answer

okay wait now I'm lost xD I got x=30