ctetf14p1 q31

31The perimeter of a square is 20 cm. A rectangle has the same width as the square. The length of the rectangle is double its width. The area, (in sq cm) of the rectangle is

Option : B
Explanation : Perimeter of square = 20 cm
∴ 4 × Side = 20
Side = 20/4 = 5 cm
Now, Side of square = Width of rectangle
= 5 cm
and Length of rectangle = 2 × Width
= 2 × 5 = 10 cm
Now, Area of rectangle = Length × Breadth
= 10 × 5 = 50 cm²

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