NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 4: Simple Equations - Problems and SolutionsQuestion 99
Class 7 - Mathematics - Unit 4: Simple Equations - Problems and Solutions
Question. 99
The length of a rectangle is two times its width. The perimeter of the rectangle is 180 cm. Find the dimensions of the rectangle.
Answer:
width = 30 cm, length = 60 cm
Detailed Answer with Explanation:
Let width = x, length = 2x.
Perimeter = 2(l + b) = 180 ⇒ l + b = 90.
So 2x + x = 90 ⇒ 3x = 90 ⇒ x = 30.
Width = 30 cm, Length = 60 cm.