Question

The length of a rectangle is twice its breadth. If its perimeter is 42 cm. Find the dimensions of the rectangle.let x be its breadth

Answer 1

Answer:

I got this question in my exam and it's answer is 7 which I can't write in exam

Answer 2

Given,

The length of a rectangle is twice its breadth. Its perimeter is 42 cm.

To Find,

The dimensions of the triangle =?

Solution,

We can solve the question as follows:
It is given that the length of a rectangle is twice its breadth. Its perimeter is 42 cm. We have to find the dimensions of the rectangle.

$Perimeter\: of\: the\: rectangle = 42\: cm$

Let the breadth of the rectangle be x. Then the length will be equal to 2x.

$Breadth\: of\: the\: rectangle = x$

$Length\: of\: the\: rectangle = 2x$

Now,

The perimeter of a rectangle is given as:

$Perimeter = 2(Length + Breadth)$

To find the dimensions, we will substitute the given values in the above formula,

$42\: cm = 2(2x + x)$

Solving the above equation to find the value of x,

$42 = 2(3x)$

$42 = 6x$

$x = \frac{42}{6} = 7$

Therefore,

Breadth = 7 cm

The length will be equal to 2x = 2*7 = 14 cm

Hence, the dimensions of the rectangle are 14 cm and 7 cm.