Question

The length of the rectangle is twice its width. The perimeter of rectangle is 100cm. Find its dimensions by matrix inverse method or Cramer rule

Answer 1

Answer:

L=10 ,b= 5

Step-by-step explanation:

L= twice of a width (2B)

width= B

perimeter of a rectangle = 2(L+B)

2(2B+B)=30

2(3B)=30

6B= 30

B=5

then length= 10