Question

Find the dimensions of a rectangle whose length is twice the breadth and whose perimeter is 12 sqm.

• A. breadth = 2m length = 4m
• B. breadth = 2m length = 9m
• C. breadth = 6m length = 4m
• D. breadth = 2m length = 7m

Answer 1

The correct option is A

breadth = 2m

length = 4m

Let the breadth be 'x' metres.

then the length is '2x' metres.

Given that the perimeter = 12 sqm.

$2(l+b)=12$

$2(2x+x)=12$

$2\left(3x\right)=12$

$6x=12$

$x=\frac{12}{6}$

$x=2$

breadth = x = 2 m

length = 2x = 4 m.