Answer:
18 centimetres
Explanation:
From the question given; The perimeter of a rectangle is 90 centimetres the length is 27 centimetres what is the width length of the rectangle?
To find the width, we are going to follow the steps below:
First write down then formula for finding perimeter of a rectangle
Perimeter of a rectangle = 2l + 2w
where l is the length of the rectangle and w is the width of the rectangle.
From the question given; perimeter = 90 centimetres and length = 27 centimetres.
We can now proceed to insert our values into the formula;
Perimeter of a rectangle = 2l + 2w
90 =2(27) + 2w
90 = 54 + 2w
subtract 54 from both-side of the equation
90 - 54 = 54 - 54 + 2w
36 = 2w
Divide both-side of the equation by 2
=
(At the right-hand side of the equation 2 at the numerator will cancel-out 2 at the denominator, leaving us with just w, while on the left-hand side of the equation 36 will be divided by 2)
18 = w
w = 18 centimetres
Therefore, the width of rectangle is 18 centimetres