The only numbers that the criteria fit is 6 and 18
length=18 cm
width=6 cm
6*3=18, so it fits
6+6+18+18=48
Perimeter=48 cm
Answer:
48cm
Explanation:
take width of rectangle to be=xcm
Length will be 3x
Area of rectangle=length × width
A=3x × x =3x²
3x²=108
x²=108/3=36
x²=36
x=√36=6cm
substitute
lenth=3x=3×6=18
width=x=6cm
perimeter=2l+2w
p=2×18 + 2×6
p=36+12=48cm
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