1.

The length and breadth of a rectangle are in the ratio 3 : 7. Perimeter of the given rectangle is 80 m. Find the area of the rectangle.1). 396 m22). 316 m23). 336 m24). 350 m2

Answer»

LET the length and BREADTH of the rectangle are 3x and 7x RESPECTIVELY

Perimeter of the rectangle = 80

⇒ 2(l + B) = 80

⇒ 2(3x + 7x) = 80

⇒ 10x = 40

⇒ x = 4

∴ The area of the rectangle = lb = 7x × 3x = 21x2 = 21 × 16 = 336 m2 



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