Question

Q#2 The perimeter of the rectangle is 158cm. If the length is 7 more than three times the width. Find the
dimensions of the rectangle by matrix inversion method.
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Answer 1

Answer:

Step-by-step explanation:

let's width of rectangle = x

length. =3x+7

perimeter of rectangle =158cm

2(l+b)=158

2(3x+7+x)=158

2(4x+7)=158

8x+14=158

8x=158-14

x=144/8

x=18cm

so. width =18

length =3x18+7

=54+7=61cm

area of rectangle =lxb.

=61x18

=1098cm^2