Ratio of perimeters

Rectangle ABCD has dimensions 3 cm and 4 cm, KLMN rectangle has dimensions 4 cm and 12 cm. Calculate the ratio of the perimeter ABCD and perimeter KLMN.

Correct result:

p =  0.4375

Solution:

p=2(a+b)2(k+l)=3+44+12=0.4375

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