Question

The length of a rectangle is twice its width the perimeter is 42 find the length and width for the rectangle

Answer 1

Answer:

length is 14 and breadth is 7

Step-by-step explanation:

the perimeter is 42 and

2(l+b)=42

(l+b)=21

here l is twice of b

hence if b is x then l is 2x

2x+x=21

3x=21

x=7

hence l is 14 and b is 7

Answer 2

Step-by-step explanation:

Let the width of the rectangle be x.

Length of rectangle = 2x

Perimeter = 2(l + b)

2(x + 2x) = 42m

2(3x) = 42m

6x = 42m

x = 7m

Therefore, width of rectangle = 7m

Length of rectangle = 14m