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The length of a rectangle is twice that of its breadth. If its perimeter is 780 cm, calculate its area.1). 16900 cm22). 36800 cm23). 67600 cm24). 33800 cm2 |
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Answer» LET the BREADTH be ‘b’ and LENGTH be ‘l’, ACCORDING to question Length = 2 × breadth ⇒ l = 2b Perimeter of a rectangle = 2 (length + breadth) = 2(2b + b) = 2 × 3b = 6b Perimeter of the given rectangle = 780 cm ⇒ 6b = 780 cm ⇒ b = 130 cm ⇒ l = 2 × 130 = 260 cm We know that area of Rectangle = Length × Breadth ⇒ Area = 260 × 130 = 33800 cm2 |
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